./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.1.prop2-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.1.prop2-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8 --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 64bit --witnessprinter.graph.data.programhash e0b3b6b781ffc688dafba255fdda5ddb1bc0b2a1529746a3260ac898e37a723c --- 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-e04fb08 [2022-11-16 12:40:04,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:40:04,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:40:04,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:40:04,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:40:04,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:40:04,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:40:04,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:40:04,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:40:04,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:40:04,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:40:04,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:40:04,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:40:04,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:40:04,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:40:04,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:40:04,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:40:04,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:40:04,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:40:04,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:40:04,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:40:04,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:40:04,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:40:04,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:40:04,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:40:04,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:40:04,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:40:04,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:40:04,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:40:04,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:40:04,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:40:04,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:40:04,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:40:04,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:40:04,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:40:04,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:40:04,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:40:04,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:40:04,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:40:04,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:40:04,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:40:04,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 12:40:04,316 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:40:04,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:40:04,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:40:04,321 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:40:04,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:40:04,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:40:04,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:40:04,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:40:04,323 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:40:04,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:40:04,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:40:04,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:40:04,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:40:04,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:40:04,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:40:04,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:40:04,326 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:40:04,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:40:04,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:40:04,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:40:04,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:40:04,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:40:04,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:40:04,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:40:04,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:40:04,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:40:04,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:40:04,329 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:40:04,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:40:04,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:40:04,330 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_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0b3b6b781ffc688dafba255fdda5ddb1bc0b2a1529746a3260ac898e37a723c [2022-11-16 12:40:04,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:40:04,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:40:04,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:40:04,690 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:40:04,691 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:40:04,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.1.prop2-back-serstep.c [2022-11-16 12:40:04,776 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/data/6374ddd36/a7b3bcd96d7340299aa562f259d635f2/FLAG45eac990a [2022-11-16 12:40:05,418 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:40:05,418 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.1.prop2-back-serstep.c [2022-11-16 12:40:05,448 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/data/6374ddd36/a7b3bcd96d7340299aa562f259d635f2/FLAG45eac990a [2022-11-16 12:40:05,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/data/6374ddd36/a7b3bcd96d7340299aa562f259d635f2 [2022-11-16 12:40:05,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:40:05,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:40:05,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:40:05,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:40:05,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:40:05,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:40:05" (1/1) ... [2022-11-16 12:40:05,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e78e329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:05, skipping insertion in model container [2022-11-16 12:40:05,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:40:05" (1/1) ... [2022-11-16 12:40:05,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:40:05,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:40:05,987 WARN L229 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_a1d26db7-1821-4d50-8854-c3c8e9b24839/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.1.prop2-back-serstep.c[1014,1027] [2022-11-16 12:40:06,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:40:06,465 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:40:06,475 WARN L229 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_a1d26db7-1821-4d50-8854-c3c8e9b24839/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.1.prop2-back-serstep.c[1014,1027] [2022-11-16 12:40:06,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:40:06,700 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:40:06,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06 WrapperNode [2022-11-16 12:40:06,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:40:06,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:40:06,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:40:06,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:40:06,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:06,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:07,000 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2830 [2022-11-16 12:40:07,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:40:07,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:40:07,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:40:07,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:40:07,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:07,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:07,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:07,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:07,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:07,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:07,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:07,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:07,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:40:07,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:40:07,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:40:07,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:40:07,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (1/1) ... [2022-11-16 12:40:07,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:40:07,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:07,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:40:07,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:40:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:40:07,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:40:07,909 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:40:07,912 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:40:11,227 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:40:11,250 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:40:11,251 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:40:11,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:40:11 BoogieIcfgContainer [2022-11-16 12:40:11,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:40:11,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:40:11,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:40:11,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:40:11,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:40:05" (1/3) ... [2022-11-16 12:40:11,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ac5b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:40:11, skipping insertion in model container [2022-11-16 12:40:11,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:40:06" (2/3) ... [2022-11-16 12:40:11,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ac5b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:40:11, skipping insertion in model container [2022-11-16 12:40:11,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:40:11" (3/3) ... [2022-11-16 12:40:11,267 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.resistance.1.prop2-back-serstep.c [2022-11-16 12:40:11,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:40:11,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:40:11,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:40:11,384 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;@5c65a362, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:40:11,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:40:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 479 states, 477 states have (on average 1.6624737945492662) internal successors, (793), 478 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 12:40:11,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:11,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:11,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:40:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:11,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1313805690, now seen corresponding path program 1 times [2022-11-16 12:40:11,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:11,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794754755] [2022-11-16 12:40:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:11,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:12,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:12,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794754755] [2022-11-16 12:40:12,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794754755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:12,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:40:12,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:40:12,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465363018] [2022-11-16 12:40:12,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:12,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:40:12,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:40:12,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:40:12,523 INFO L87 Difference]: Start difference. First operand has 479 states, 477 states have (on average 1.6624737945492662) internal successors, (793), 478 states have internal predecessors, (793), 0 states have call successors, (0), 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 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:12,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:12,828 INFO L93 Difference]: Finished difference Result 1582 states and 2632 transitions. [2022-11-16 12:40:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:40:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-11-16 12:40:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:12,865 INFO L225 Difference]: With dead ends: 1582 [2022-11-16 12:40:12,871 INFO L226 Difference]: Without dead ends: 1105 [2022-11-16 12:40:12,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:40:12,894 INFO L413 NwaCegarLoop]: 1050 mSDtfsCounter, 2337 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2337 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:12,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2337 Valid, 2358 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:40:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-11-16 12:40:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 477. [2022-11-16 12:40:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.6575630252100841) internal successors, (789), 476 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 789 transitions. [2022-11-16 12:40:13,022 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 789 transitions. Word has length 111 [2022-11-16 12:40:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:13,024 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 789 transitions. [2022-11-16 12:40:13,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 789 transitions. [2022-11-16 12:40:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 12:40:13,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:13,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:13,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:40:13,028 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:40:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:13,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2071545142, now seen corresponding path program 1 times [2022-11-16 12:40:13,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:13,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025879552] [2022-11-16 12:40:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:13,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:13,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:13,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025879552] [2022-11-16 12:40:13,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025879552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:40:13,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:40:13,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:40:13,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148090396] [2022-11-16 12:40:13,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:13,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:40:13,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:13,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:40:13,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:40:13,662 INFO L87 Difference]: Start difference. First operand 477 states and 789 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:14,099 INFO L93 Difference]: Finished difference Result 1889 states and 3134 transitions. [2022-11-16 12:40:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:40:14,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-11-16 12:40:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:14,110 INFO L225 Difference]: With dead ends: 1889 [2022-11-16 12:40:14,110 INFO L226 Difference]: Without dead ends: 1414 [2022-11-16 12:40:14,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:40:14,116 INFO L413 NwaCegarLoop]: 1044 mSDtfsCounter, 1971 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1971 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:14,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1971 Valid, 2606 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:40:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-11-16 12:40:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 635. [2022-11-16 12:40:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:40:14,178 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 112 [2022-11-16 12:40:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:14,179 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:40:14,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:40:14,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-11-16 12:40:14,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:14,209 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:40:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:40:14,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:40:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:14,217 INFO L85 PathProgramCache]: Analyzing trace with hash 545782956, now seen corresponding path program 1 times [2022-11-16 12:40:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:14,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285510841] [2022-11-16 12:40:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:33,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:33,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285510841] [2022-11-16 12:40:33,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285510841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:33,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739918121] [2022-11-16 12:40:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:34,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:34,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:34,011 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:34,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:40:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:35,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 3496 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 12:40:35,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:40,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-16 12:40:41,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739918121] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:41,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:40:41,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 8] total 15 [2022-11-16 12:40:41,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829352447] [2022-11-16 12:40:41,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:40:41,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:40:41,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:40:41,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:40:41,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:40:41,347 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:45,382 INFO L93 Difference]: Finished difference Result 3165 states and 5160 transitions. [2022-11-16 12:40:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:40:45,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 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 427 [2022-11-16 12:40:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:45,393 INFO L225 Difference]: With dead ends: 3165 [2022-11-16 12:40:45,394 INFO L226 Difference]: Without dead ends: 2690 [2022-11-16 12:40:45,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 847 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:40:45,397 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 4366 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 2732 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4366 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 3007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:45,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4366 Valid, 1764 Invalid, 3007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2732 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-16 12:40:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2022-11-16 12:40:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 638. [2022-11-16 12:40:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 1.6562009419152277) internal successors, (1055), 637 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1055 transitions. [2022-11-16 12:40:45,427 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1055 transitions. Word has length 427 [2022-11-16 12:40:45,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:45,428 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 1055 transitions. [2022-11-16 12:40:45,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1055 transitions. [2022-11-16 12:40:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-11-16 12:40:45,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:45,437 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:40:45,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:40:45,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:45,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:40:45,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash 545842538, now seen corresponding path program 1 times [2022-11-16 12:40:45,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:40:45,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235190445] [2022-11-16 12:40:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:40:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:40:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:58,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:40:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235190445] [2022-11-16 12:40:58,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235190445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:40:58,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250239874] [2022-11-16 12:40:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:40:58,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:40:58,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:40:58,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:40:58,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:41:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 3496 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 12:41:00,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:04,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-16 12:41:05,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250239874] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:05,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:41:05,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 8] total 14 [2022-11-16 12:41:05,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438529735] [2022-11-16 12:41:05,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:05,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:41:05,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:05,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:41:05,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:41:05,543 INFO L87 Difference]: Start difference. First operand 638 states and 1055 transitions. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:07,939 INFO L93 Difference]: Finished difference Result 2051 states and 3399 transitions. [2022-11-16 12:41:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:41:07,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 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 427 [2022-11-16 12:41:07,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:07,946 INFO L225 Difference]: With dead ends: 2051 [2022-11-16 12:41:07,946 INFO L226 Difference]: Without dead ends: 1573 [2022-11-16 12:41:07,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 847 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:41:07,948 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 2327 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2327 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:07,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2327 Valid, 1026 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 12:41:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2022-11-16 12:41:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 635. [2022-11-16 12:41:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:41:07,972 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 427 [2022-11-16 12:41:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:07,973 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:41:07,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:41:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-11-16 12:41:07,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:07,978 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:41:07,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 12:41:08,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:08,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:41:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:08,200 INFO L85 PathProgramCache]: Analyzing trace with hash -471029378, now seen corresponding path program 1 times [2022-11-16 12:41:08,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:08,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116448694] [2022-11-16 12:41:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:08,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:17,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:17,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116448694] [2022-11-16 12:41:17,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116448694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:17,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321396551] [2022-11-16 12:41:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:17,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:17,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:17,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:17,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:41:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 3499 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 12:41:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:23,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-16 12:41:24,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321396551] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:24,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:41:24,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 9] total 17 [2022-11-16 12:41:24,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517701723] [2022-11-16 12:41:24,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:24,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:41:24,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:24,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:41:24,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:41:24,859 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 6 states, 6 states have (on average 54.5) internal successors, (327), 6 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:28,832 INFO L93 Difference]: Finished difference Result 2400 states and 3927 transitions. [2022-11-16 12:41:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:41:28,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 54.5) internal successors, (327), 6 states have internal predecessors, (327), 0 states have call successors, (0), 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 428 [2022-11-16 12:41:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:28,848 INFO L225 Difference]: With dead ends: 2400 [2022-11-16 12:41:28,849 INFO L226 Difference]: Without dead ends: 1923 [2022-11-16 12:41:28,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:41:28,853 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 2586 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 4144 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2586 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:28,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2586 Valid, 2228 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4144 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-16 12:41:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-11-16 12:41:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 641. [2022-11-16 12:41:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 1.65625) internal successors, (1060), 640 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1060 transitions. [2022-11-16 12:41:28,880 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1060 transitions. Word has length 428 [2022-11-16 12:41:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:28,882 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 1060 transitions. [2022-11-16 12:41:28,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.5) internal successors, (327), 6 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1060 transitions. [2022-11-16 12:41:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-11-16 12:41:28,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:28,887 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:41:28,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:29,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:29,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:41:29,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash -470969796, now seen corresponding path program 1 times [2022-11-16 12:41:29,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:29,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824615892] [2022-11-16 12:41:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:29,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:38,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:38,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824615892] [2022-11-16 12:41:38,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824615892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:38,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134225788] [2022-11-16 12:41:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:38,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:38,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:38,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:38,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:41:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:39,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 3499 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 12:41:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:43,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-16 12:41:44,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134225788] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:44,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:41:44,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 10] total 16 [2022-11-16 12:41:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973516525] [2022-11-16 12:41:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:44,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:41:44,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:41:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:41:44,138 INFO L87 Difference]: Start difference. First operand 641 states and 1060 transitions. Second operand has 6 states, 6 states have (on average 54.5) internal successors, (327), 6 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:46,936 INFO L93 Difference]: Finished difference Result 2400 states and 3928 transitions. [2022-11-16 12:41:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:41:46,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 54.5) internal successors, (327), 6 states have internal predecessors, (327), 0 states have call successors, (0), 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 428 [2022-11-16 12:41:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:46,943 INFO L225 Difference]: With dead ends: 2400 [2022-11-16 12:41:46,944 INFO L226 Difference]: Without dead ends: 1917 [2022-11-16 12:41:46,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:41:46,946 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 3343 mSDsluCounter, 2274 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3343 SdHoareTripleChecker+Valid, 2996 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:46,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3343 Valid, 2996 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-16 12:41:46,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2022-11-16 12:41:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 635. [2022-11-16 12:41:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:41:46,967 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 428 [2022-11-16 12:41:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:46,968 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:41:46,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.5) internal successors, (327), 6 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:41:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-11-16 12:41:46,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:46,973 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:41:47,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:47,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 12:41:47,187 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:41:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash -117101422, now seen corresponding path program 1 times [2022-11-16 12:41:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:47,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595285139] [2022-11-16 12:41:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:47,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:56,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:56,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595285139] [2022-11-16 12:41:56,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595285139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:56,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946828449] [2022-11-16 12:41:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:56,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:56,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:56,567 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:56,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:41:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:58,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 3502 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 12:41:58,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:02,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-16 12:42:03,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946828449] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:03,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:42:03,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 10] total 19 [2022-11-16 12:42:03,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798488717] [2022-11-16 12:42:03,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:03,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:42:03,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:42:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:42:03,594 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 7 states, 7 states have (on average 47.142857142857146) internal successors, (330), 7 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:09,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:09,677 INFO L93 Difference]: Finished difference Result 3355 states and 5510 transitions. [2022-11-16 12:42:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:42:09,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 47.142857142857146) internal successors, (330), 7 states have internal predecessors, (330), 0 states have call successors, (0), 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 429 [2022-11-16 12:42:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:09,690 INFO L225 Difference]: With dead ends: 3355 [2022-11-16 12:42:09,690 INFO L226 Difference]: Without dead ends: 2875 [2022-11-16 12:42:09,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:42:09,693 INFO L413 NwaCegarLoop]: 1159 mSDtfsCounter, 4568 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 6362 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4568 SdHoareTripleChecker+Valid, 3343 SdHoareTripleChecker+Invalid, 6500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 6362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:09,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4568 Valid, 3343 Invalid, 6500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 6362 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-16 12:42:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2022-11-16 12:42:09,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 644. [2022-11-16 12:42:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 1.656298600311042) internal successors, (1065), 643 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1065 transitions. [2022-11-16 12:42:09,722 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1065 transitions. Word has length 429 [2022-11-16 12:42:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:09,723 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 1065 transitions. [2022-11-16 12:42:09,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 47.142857142857146) internal successors, (330), 7 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1065 transitions. [2022-11-16 12:42:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-11-16 12:42:09,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:09,728 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:42:09,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:09,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:09,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash -117041840, now seen corresponding path program 1 times [2022-11-16 12:42:09,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:09,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127452789] [2022-11-16 12:42:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:09,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:18,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:18,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127452789] [2022-11-16 12:42:18,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127452789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:18,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383770011] [2022-11-16 12:42:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:18,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:18,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:18,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:18,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:42:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 3502 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-16 12:42:20,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:23,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-16 12:42:24,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383770011] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:24,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:42:24,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 11] total 18 [2022-11-16 12:42:24,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191133421] [2022-11-16 12:42:24,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:24,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:42:24,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:42:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:42:24,653 INFO L87 Difference]: Start difference. First operand 644 states and 1065 transitions. Second operand has 7 states, 7 states have (on average 47.142857142857146) internal successors, (330), 7 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:28,759 INFO L93 Difference]: Finished difference Result 2895 states and 4746 transitions. [2022-11-16 12:42:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:42:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 47.142857142857146) internal successors, (330), 7 states have internal predecessors, (330), 0 states have call successors, (0), 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 429 [2022-11-16 12:42:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:28,768 INFO L225 Difference]: With dead ends: 2895 [2022-11-16 12:42:28,768 INFO L226 Difference]: Without dead ends: 2406 [2022-11-16 12:42:28,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:42:28,770 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 4534 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 3913 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4534 SdHoareTripleChecker+Valid, 3260 SdHoareTripleChecker+Invalid, 4051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:28,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4534 Valid, 3260 Invalid, 4051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 3913 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-16 12:42:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2022-11-16 12:42:28,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 635. [2022-11-16 12:42:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:42:28,796 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 429 [2022-11-16 12:42:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:28,797 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:42:28,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 47.142857142857146) internal successors, (330), 7 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:42:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-11-16 12:42:28,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:28,801 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:42:28,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:29,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:29,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:29,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1589827994, now seen corresponding path program 1 times [2022-11-16 12:42:29,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:29,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319695783] [2022-11-16 12:42:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:29,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:38,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:38,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319695783] [2022-11-16 12:42:38,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319695783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:38,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431480610] [2022-11-16 12:42:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:38,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:38,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:38,803 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:38,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:42:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 3505 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 12:42:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:43,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-16 12:42:45,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431480610] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:45,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:42:45,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 11] total 21 [2022-11-16 12:42:45,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651648779] [2022-11-16 12:42:45,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:45,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:42:45,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:45,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:42:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:42:45,392 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 8 states, 8 states have (on average 41.625) internal successors, (333), 8 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:52,476 INFO L93 Difference]: Finished difference Result 3391 states and 5570 transitions. [2022-11-16 12:42:52,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:42:52,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 41.625) internal successors, (333), 8 states have internal predecessors, (333), 0 states have call successors, (0), 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 430 [2022-11-16 12:42:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:52,488 INFO L225 Difference]: With dead ends: 3391 [2022-11-16 12:42:52,488 INFO L226 Difference]: Without dead ends: 2908 [2022-11-16 12:42:52,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 858 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:42:52,491 INFO L413 NwaCegarLoop]: 1152 mSDtfsCounter, 6142 mSDsluCounter, 2925 mSDsCounter, 0 mSdLazyCounter, 7959 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6142 SdHoareTripleChecker+Valid, 4077 SdHoareTripleChecker+Invalid, 8097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 7959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:52,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6142 Valid, 4077 Invalid, 8097 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 7959 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-16 12:42:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2022-11-16 12:42:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 647. [2022-11-16 12:42:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 1.6563467492260062) internal successors, (1070), 646 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:52,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1070 transitions. [2022-11-16 12:42:52,521 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1070 transitions. Word has length 430 [2022-11-16 12:42:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:52,522 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 1070 transitions. [2022-11-16 12:42:52,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 41.625) internal successors, (333), 8 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1070 transitions. [2022-11-16 12:42:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-11-16 12:42:52,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:52,527 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:42:52,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:52,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 12:42:52,733 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:42:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1589887576, now seen corresponding path program 1 times [2022-11-16 12:42:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:52,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102023779] [2022-11-16 12:42:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:01,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:01,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102023779] [2022-11-16 12:43:01,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102023779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:01,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026544441] [2022-11-16 12:43:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:01,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:01,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:01,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:01,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:43:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:03,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 3505 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 12:43:03,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:06,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-16 12:43:07,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026544441] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:07,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:43:07,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 12] total 20 [2022-11-16 12:43:07,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351043028] [2022-11-16 12:43:07,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:07,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:43:07,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:07,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:43:07,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:43:07,973 INFO L87 Difference]: Start difference. First operand 647 states and 1070 transitions. Second operand has 8 states, 8 states have (on average 41.625) internal successors, (333), 8 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:12,755 INFO L93 Difference]: Finished difference Result 2932 states and 4806 transitions. [2022-11-16 12:43:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:43:12,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 41.625) internal successors, (333), 8 states have internal predecessors, (333), 0 states have call successors, (0), 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 430 [2022-11-16 12:43:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:12,765 INFO L225 Difference]: With dead ends: 2932 [2022-11-16 12:43:12,765 INFO L226 Difference]: Without dead ends: 2437 [2022-11-16 12:43:12,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 857 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:43:12,768 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 4912 mSDsluCounter, 3692 mSDsCounter, 0 mSdLazyCounter, 4826 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4912 SdHoareTripleChecker+Valid, 4640 SdHoareTripleChecker+Invalid, 4964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:12,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4912 Valid, 4640 Invalid, 4964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4826 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 12:43:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2022-11-16 12:43:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 635. [2022-11-16 12:43:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:43:12,795 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 430 [2022-11-16 12:43:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:12,796 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:43:12,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 41.625) internal successors, (333), 8 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:43:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-11-16 12:43:12,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:12,801 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:43:12,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:13,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:43:13,016 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:43:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash -580027526, now seen corresponding path program 1 times [2022-11-16 12:43:13,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:13,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121144385] [2022-11-16 12:43:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:13,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:20,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:20,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121144385] [2022-11-16 12:43:20,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121144385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:20,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76126807] [2022-11-16 12:43:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:20,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:20,214 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:20,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:43:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 3508 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 12:43:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:25,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 12:43:27,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76126807] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:27,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:43:27,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 12] total 24 [2022-11-16 12:43:27,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14720119] [2022-11-16 12:43:27,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:27,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:43:27,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:27,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:43:27,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:43:27,447 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 9 states, 9 states have (on average 37.333333333333336) internal successors, (336), 9 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:35,607 INFO L93 Difference]: Finished difference Result 3427 states and 5630 transitions. [2022-11-16 12:43:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:43:35,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 37.333333333333336) internal successors, (336), 9 states have internal predecessors, (336), 0 states have call successors, (0), 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 431 [2022-11-16 12:43:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:35,617 INFO L225 Difference]: With dead ends: 3427 [2022-11-16 12:43:35,618 INFO L226 Difference]: Without dead ends: 2941 [2022-11-16 12:43:35,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=1409, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:43:35,621 INFO L413 NwaCegarLoop]: 1145 mSDtfsCounter, 7721 mSDsluCounter, 3664 mSDsCounter, 0 mSdLazyCounter, 9558 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7721 SdHoareTripleChecker+Valid, 4809 SdHoareTripleChecker+Invalid, 9696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 9558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:35,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7721 Valid, 4809 Invalid, 9696 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 9558 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-16 12:43:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2022-11-16 12:43:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 650. [2022-11-16 12:43:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 1.6563944530046224) internal successors, (1075), 649 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1075 transitions. [2022-11-16 12:43:35,651 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1075 transitions. Word has length 431 [2022-11-16 12:43:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:35,652 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 1075 transitions. [2022-11-16 12:43:35,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 37.333333333333336) internal successors, (336), 9 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1075 transitions. [2022-11-16 12:43:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-11-16 12:43:35,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:35,656 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:43:35,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:35,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:43:35,871 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:43:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:35,872 INFO L85 PathProgramCache]: Analyzing trace with hash -579967944, now seen corresponding path program 1 times [2022-11-16 12:43:35,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:35,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562041740] [2022-11-16 12:43:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:35,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:44,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:44,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562041740] [2022-11-16 12:43:44,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562041740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:44,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113867648] [2022-11-16 12:43:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:44,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:44,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:44,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:43:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 3508 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 12:43:46,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:49,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 12:43:50,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113867648] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:50,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:43:50,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 13] total 22 [2022-11-16 12:43:50,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829114434] [2022-11-16 12:43:50,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:50,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:43:50,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:50,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:43:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:43:50,707 INFO L87 Difference]: Start difference. First operand 650 states and 1075 transitions. Second operand has 9 states, 9 states have (on average 37.333333333333336) internal successors, (336), 9 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:56,240 INFO L93 Difference]: Finished difference Result 2972 states and 4872 transitions. [2022-11-16 12:43:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:43:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 37.333333333333336) internal successors, (336), 9 states have internal predecessors, (336), 0 states have call successors, (0), 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 431 [2022-11-16 12:43:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:56,246 INFO L225 Difference]: With dead ends: 2972 [2022-11-16 12:43:56,246 INFO L226 Difference]: Without dead ends: 2471 [2022-11-16 12:43:56,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=1586, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:43:56,249 INFO L413 NwaCegarLoop]: 946 mSDtfsCounter, 6113 mSDsluCounter, 3716 mSDsCounter, 0 mSdLazyCounter, 5769 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6113 SdHoareTripleChecker+Valid, 4662 SdHoareTripleChecker+Invalid, 5907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 5769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:56,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6113 Valid, 4662 Invalid, 5907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 5769 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-16 12:43:56,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2022-11-16 12:43:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 635. [2022-11-16 12:43:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:43:56,271 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 431 [2022-11-16 12:43:56,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:56,272 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:43:56,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 37.333333333333336) internal successors, (336), 9 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:56,273 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:43:56,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-11-16 12:43:56,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:56,276 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:43:56,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:56,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:43:56,492 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:43:56,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:56,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1652980404, now seen corresponding path program 1 times [2022-11-16 12:43:56,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:56,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646077092] [2022-11-16 12:43:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:56,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:04,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:04,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646077092] [2022-11-16 12:44:04,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646077092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:04,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397675206] [2022-11-16 12:44:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:04,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:04,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:04,372 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:04,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:44:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:06,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 3511 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 12:44:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:09,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-16 12:44:10,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397675206] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:10,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:10,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 13] total 25 [2022-11-16 12:44:10,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696998898] [2022-11-16 12:44:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:10,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:44:10,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:44:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:44:10,917 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 10 states, 10 states have (on average 33.9) internal successors, (339), 10 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) [2022-11-16 12:44:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:19,572 INFO L93 Difference]: Finished difference Result 3463 states and 5690 transitions. [2022-11-16 12:44:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:44:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 33.9) internal successors, (339), 10 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 432 [2022-11-16 12:44:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:19,579 INFO L225 Difference]: With dead ends: 3463 [2022-11-16 12:44:19,579 INFO L226 Difference]: Without dead ends: 2974 [2022-11-16 12:44:19,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 866 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=1771, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 12:44:19,582 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 8892 mSDsluCounter, 4474 mSDsCounter, 0 mSdLazyCounter, 11658 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8892 SdHoareTripleChecker+Valid, 5612 SdHoareTripleChecker+Invalid, 11796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 11658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:19,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8892 Valid, 5612 Invalid, 11796 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 11658 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-16 12:44:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2022-11-16 12:44:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 653. [2022-11-16 12:44:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.656441717791411) internal successors, (1080), 652 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1080 transitions. [2022-11-16 12:44:19,604 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1080 transitions. Word has length 432 [2022-11-16 12:44:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:19,605 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 1080 transitions. [2022-11-16 12:44:19,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.9) internal successors, (339), 10 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) [2022-11-16 12:44:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1080 transitions. [2022-11-16 12:44:19,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-11-16 12:44:19,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:19,609 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:44:19,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:19,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:19,827 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:44:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:19,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1653039986, now seen corresponding path program 1 times [2022-11-16 12:44:19,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:19,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238684807] [2022-11-16 12:44:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:19,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:27,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:27,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238684807] [2022-11-16 12:44:27,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238684807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:27,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316167801] [2022-11-16 12:44:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:27,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:27,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:27,053 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:27,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:44:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:28,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 3511 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 12:44:28,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:32,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-16 12:44:32,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316167801] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:32,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:32,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 14] total 24 [2022-11-16 12:44:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179755496] [2022-11-16 12:44:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:32,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:44:32,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:44:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:44:32,929 INFO L87 Difference]: Start difference. First operand 653 states and 1080 transitions. Second operand has 10 states, 10 states have (on average 33.9) internal successors, (339), 10 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) [2022-11-16 12:44:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:38,666 INFO L93 Difference]: Finished difference Result 3012 states and 4938 transitions. [2022-11-16 12:44:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 12:44:38,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 33.9) internal successors, (339), 10 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 432 [2022-11-16 12:44:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:38,670 INFO L225 Difference]: With dead ends: 3012 [2022-11-16 12:44:38,670 INFO L226 Difference]: Without dead ends: 2505 [2022-11-16 12:44:38,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=2142, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 12:44:38,677 INFO L413 NwaCegarLoop]: 944 mSDtfsCounter, 6910 mSDsluCounter, 4413 mSDsCounter, 0 mSdLazyCounter, 6741 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6910 SdHoareTripleChecker+Valid, 5357 SdHoareTripleChecker+Invalid, 6879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 6741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:38,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6910 Valid, 5357 Invalid, 6879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 6741 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-16 12:44:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2022-11-16 12:44:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 635. [2022-11-16 12:44:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:44:38,700 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 432 [2022-11-16 12:44:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:38,701 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:44:38,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.9) internal successors, (339), 10 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) [2022-11-16 12:44:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:44:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-16 12:44:38,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:38,705 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:44:38,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 12:44:38,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:38,922 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:44:38,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:38,922 INFO L85 PathProgramCache]: Analyzing trace with hash 900968288, now seen corresponding path program 1 times [2022-11-16 12:44:38,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:38,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882486089] [2022-11-16 12:44:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:38,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:45,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:45,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882486089] [2022-11-16 12:44:45,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882486089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:45,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871041901] [2022-11-16 12:44:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:45,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:45,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:45,863 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:45,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:44:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:47,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 3514 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 12:44:47,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:50,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 12:44:52,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871041901] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:52,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:52,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 14] total 27 [2022-11-16 12:44:52,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207328653] [2022-11-16 12:44:52,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:52,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:44:52,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:52,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:44:52,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:44:52,099 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 11 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:01,911 INFO L93 Difference]: Finished difference Result 3499 states and 5750 transitions. [2022-11-16 12:45:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:45:01,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 11 states have internal predecessors, (342), 0 states have call successors, (0), 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 [2022-11-16 12:45:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:01,918 INFO L225 Difference]: With dead ends: 3499 [2022-11-16 12:45:01,918 INFO L226 Difference]: Without dead ends: 3007 [2022-11-16 12:45:01,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 870 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=2273, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:45:01,920 INFO L413 NwaCegarLoop]: 1131 mSDtfsCounter, 10481 mSDsluCounter, 5210 mSDsCounter, 0 mSdLazyCounter, 13268 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10481 SdHoareTripleChecker+Valid, 6341 SdHoareTripleChecker+Invalid, 13406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 13268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:01,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10481 Valid, 6341 Invalid, 13406 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 13268 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-11-16 12:45:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2022-11-16 12:45:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 656. [2022-11-16 12:45:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 1.6564885496183206) internal successors, (1085), 655 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1085 transitions. [2022-11-16 12:45:01,941 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1085 transitions. Word has length 433 [2022-11-16 12:45:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:01,942 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 1085 transitions. [2022-11-16 12:45:01,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 11 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1085 transitions. [2022-11-16 12:45:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-16 12:45:01,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:01,946 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:45:01,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:02,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:02,164 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:45:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash 901027870, now seen corresponding path program 1 times [2022-11-16 12:45:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:02,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774434398] [2022-11-16 12:45:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:02,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:09,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:09,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774434398] [2022-11-16 12:45:09,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774434398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:09,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347935341] [2022-11-16 12:45:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:09,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:09,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:09,413 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:09,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:45:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:11,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 3514 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-16 12:45:11,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:14,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 12:45:15,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347935341] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:15,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:45:15,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 15] total 26 [2022-11-16 12:45:15,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098990313] [2022-11-16 12:45:15,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:15,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:45:15,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:15,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:45:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:45:15,233 INFO L87 Difference]: Start difference. First operand 656 states and 1085 transitions. Second operand has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 11 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:21,730 INFO L93 Difference]: Finished difference Result 3052 states and 5004 transitions. [2022-11-16 12:45:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:45:21,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 11 states have internal predecessors, (342), 0 states have call successors, (0), 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 [2022-11-16 12:45:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:21,736 INFO L225 Difference]: With dead ends: 3052 [2022-11-16 12:45:21,736 INFO L226 Difference]: Without dead ends: 2539 [2022-11-16 12:45:21,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 925 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=524, Invalid=2782, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 12:45:21,739 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 7303 mSDsluCounter, 5786 mSDsCounter, 0 mSdLazyCounter, 7742 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7303 SdHoareTripleChecker+Valid, 6728 SdHoareTripleChecker+Invalid, 7880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 7742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:21,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7303 Valid, 6728 Invalid, 7880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 7742 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-16 12:45:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2022-11-16 12:45:21,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 635. [2022-11-16 12:45:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:45:21,758 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 433 [2022-11-16 12:45:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:21,759 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:45:21,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 11 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:45:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-11-16 12:45:21,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:21,763 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:45:21,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:21,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:45:21,980 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:45:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:21,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1686066128, now seen corresponding path program 1 times [2022-11-16 12:45:21,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:21,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259722756] [2022-11-16 12:45:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:21,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:29,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:29,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259722756] [2022-11-16 12:45:29,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259722756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:29,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206707781] [2022-11-16 12:45:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:29,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:29,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:29,291 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:29,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:45:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:31,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 3517 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-16 12:45:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:34,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-16 12:45:36,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206707781] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:36,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:45:36,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 15] total 29 [2022-11-16 12:45:36,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350960322] [2022-11-16 12:45:36,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:36,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:45:36,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:36,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:45:36,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:45:36,287 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 12 states, 12 states have (on average 28.75) internal successors, (345), 12 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:47,211 INFO L93 Difference]: Finished difference Result 3535 states and 5810 transitions. [2022-11-16 12:45:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:45:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 28.75) internal successors, (345), 12 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 434 [2022-11-16 12:45:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:47,217 INFO L225 Difference]: With dead ends: 3535 [2022-11-16 12:45:47,217 INFO L226 Difference]: Without dead ends: 3040 [2022-11-16 12:45:47,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 874 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=469, Invalid=2837, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 12:45:47,220 INFO L413 NwaCegarLoop]: 1124 mSDtfsCounter, 12488 mSDsluCounter, 5869 mSDsCounter, 0 mSdLazyCounter, 14367 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12488 SdHoareTripleChecker+Valid, 6993 SdHoareTripleChecker+Invalid, 14505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 14367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:47,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12488 Valid, 6993 Invalid, 14505 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 14367 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-16 12:45:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2022-11-16 12:45:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 659. [2022-11-16 12:45:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.656534954407295) internal successors, (1090), 658 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1090 transitions. [2022-11-16 12:45:47,244 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1090 transitions. Word has length 434 [2022-11-16 12:45:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:47,245 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 1090 transitions. [2022-11-16 12:45:47,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.75) internal successors, (345), 12 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:47,245 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1090 transitions. [2022-11-16 12:45:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-11-16 12:45:47,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:47,249 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:45:47,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:47,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:45:47,464 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:45:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1686125710, now seen corresponding path program 1 times [2022-11-16 12:45:47,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:47,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486075880] [2022-11-16 12:45:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:47,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:57,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:57,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486075880] [2022-11-16 12:45:57,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486075880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:57,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639534543] [2022-11-16 12:45:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:57,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:57,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:57,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:57,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:45:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:59,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 3517 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 12:45:59,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:02,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-16 12:46:03,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639534543] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:03,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:46:03,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 16] total 28 [2022-11-16 12:46:03,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093000446] [2022-11-16 12:46:03,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:03,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:46:03,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:03,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:46:03,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:46:03,790 INFO L87 Difference]: Start difference. First operand 659 states and 1090 transitions. Second operand has 12 states, 12 states have (on average 28.75) internal successors, (345), 12 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:11,373 INFO L93 Difference]: Finished difference Result 3092 states and 5070 transitions. [2022-11-16 12:46:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:46:11,374 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 28.75) internal successors, (345), 12 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 434 [2022-11-16 12:46:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:11,379 INFO L225 Difference]: With dead ends: 3092 [2022-11-16 12:46:11,379 INFO L226 Difference]: Without dead ends: 2573 [2022-11-16 12:46:11,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 873 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 12:46:11,382 INFO L413 NwaCegarLoop]: 940 mSDtfsCounter, 8519 mSDsluCounter, 5795 mSDsCounter, 0 mSdLazyCounter, 8769 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8519 SdHoareTripleChecker+Valid, 6735 SdHoareTripleChecker+Invalid, 8907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 8769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:11,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8519 Valid, 6735 Invalid, 8907 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 8769 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-16 12:46:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2022-11-16 12:46:11,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 635. [2022-11-16 12:46:11,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:46:11,403 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 434 [2022-11-16 12:46:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:11,404 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:46:11,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.75) internal successors, (345), 12 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:46:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-11-16 12:46:11,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:11,408 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:46:11,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:11,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:46:11,623 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:46:11,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:11,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1929203528, now seen corresponding path program 1 times [2022-11-16 12:46:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:11,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52226150] [2022-11-16 12:46:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:11,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:20,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:20,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52226150] [2022-11-16 12:46:20,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52226150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:20,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246357747] [2022-11-16 12:46:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:20,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:20,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:20,483 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:20,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:46:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 3520 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 12:46:22,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:25,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-16 12:46:27,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246357747] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:27,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:46:27,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [6, 16] total 31 [2022-11-16 12:46:27,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645760129] [2022-11-16 12:46:27,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:27,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:46:27,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:27,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:46:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:46:27,701 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 13 states, 13 states have (on average 26.76923076923077) internal successors, (348), 13 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:39,635 INFO L93 Difference]: Finished difference Result 3571 states and 5870 transitions. [2022-11-16 12:46:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:46:39,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 26.76923076923077) internal successors, (348), 13 states have internal predecessors, (348), 0 states have call successors, (0), 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 435 [2022-11-16 12:46:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:39,640 INFO L225 Difference]: With dead ends: 3571 [2022-11-16 12:46:39,640 INFO L226 Difference]: Without dead ends: 3073 [2022-11-16 12:46:39,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 878 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=569, Invalid=3463, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 12:46:39,643 INFO L413 NwaCegarLoop]: 1117 mSDtfsCounter, 14087 mSDsluCounter, 6600 mSDsCounter, 0 mSdLazyCounter, 15974 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14087 SdHoareTripleChecker+Valid, 7717 SdHoareTripleChecker+Invalid, 16112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 15974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:39,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14087 Valid, 7717 Invalid, 16112 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 15974 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-11-16 12:46:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2022-11-16 12:46:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 662. [2022-11-16 12:46:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.6565809379727685) internal successors, (1095), 661 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1095 transitions. [2022-11-16 12:46:39,663 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1095 transitions. Word has length 435 [2022-11-16 12:46:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:39,663 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1095 transitions. [2022-11-16 12:46:39,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.76923076923077) internal successors, (348), 13 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:39,664 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1095 transitions. [2022-11-16 12:46:39,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-11-16 12:46:39,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:39,667 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:46:39,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:39,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:39,883 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:46:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1929263110, now seen corresponding path program 1 times [2022-11-16 12:46:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:39,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708339858] [2022-11-16 12:46:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:39,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:48,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:48,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708339858] [2022-11-16 12:46:48,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708339858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:48,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927982739] [2022-11-16 12:46:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:48,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:48,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:48,392 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:48,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:46:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:50,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 3520 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-16 12:46:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:53,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-16 12:46:54,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927982739] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:54,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:46:54,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [6, 17] total 30 [2022-11-16 12:46:54,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717482880] [2022-11-16 12:46:54,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:54,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:46:54,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:46:54,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:46:54,377 INFO L87 Difference]: Start difference. First operand 662 states and 1095 transitions. Second operand has 13 states, 13 states have (on average 26.76923076923077) internal successors, (348), 13 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:02,684 INFO L93 Difference]: Finished difference Result 3132 states and 5136 transitions. [2022-11-16 12:47:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 12:47:02,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 26.76923076923077) internal successors, (348), 13 states have internal predecessors, (348), 0 states have call successors, (0), 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 435 [2022-11-16 12:47:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:02,693 INFO L225 Difference]: With dead ends: 3132 [2022-11-16 12:47:02,693 INFO L226 Difference]: Without dead ends: 2607 [2022-11-16 12:47:02,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 947 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=798, Invalid=4314, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 12:47:02,696 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 9331 mSDsluCounter, 6480 mSDsCounter, 0 mSdLazyCounter, 9825 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9331 SdHoareTripleChecker+Valid, 7418 SdHoareTripleChecker+Invalid, 9963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 9825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:02,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9331 Valid, 7418 Invalid, 9963 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 9825 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-16 12:47:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2022-11-16 12:47:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 635. [2022-11-16 12:47:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:47:02,715 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 435 [2022-11-16 12:47:02,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:02,715 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:47:02,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.76923076923077) internal successors, (348), 13 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:47:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-11-16 12:47:02,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:02,719 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:47:02,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:02,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:02,939 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:47:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:02,940 INFO L85 PathProgramCache]: Analyzing trace with hash 520966378, now seen corresponding path program 1 times [2022-11-16 12:47:02,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:02,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881369886] [2022-11-16 12:47:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:02,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:11,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:11,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881369886] [2022-11-16 12:47:11,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881369886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:11,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109102576] [2022-11-16 12:47:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:11,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:11,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:11,191 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:11,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:47:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:13,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 3523 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 12:47:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:16,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 12:47:18,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109102576] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:18,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:18,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 17] total 34 [2022-11-16 12:47:18,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482558730] [2022-11-16 12:47:18,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:18,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:47:18,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:47:18,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:47:18,203 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 14 states, 14 states have (on average 25.071428571428573) internal successors, (351), 14 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:31,335 INFO L93 Difference]: Finished difference Result 3607 states and 5930 transitions. [2022-11-16 12:47:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 12:47:31,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 25.071428571428573) internal successors, (351), 14 states have internal predecessors, (351), 0 states have call successors, (0), 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 436 [2022-11-16 12:47:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:31,339 INFO L225 Difference]: With dead ends: 3607 [2022-11-16 12:47:31,339 INFO L226 Difference]: Without dead ends: 3106 [2022-11-16 12:47:31,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 882 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=681, Invalid=4289, Unknown=0, NotChecked=0, Total=4970 [2022-11-16 12:47:31,341 INFO L413 NwaCegarLoop]: 1110 mSDtfsCounter, 15278 mSDsluCounter, 7406 mSDsCounter, 0 mSdLazyCounter, 18110 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15278 SdHoareTripleChecker+Valid, 8516 SdHoareTripleChecker+Invalid, 18248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 18110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:31,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15278 Valid, 8516 Invalid, 18248 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 18110 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-11-16 12:47:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2022-11-16 12:47:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 665. [2022-11-16 12:47:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.6566265060240963) internal successors, (1100), 664 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1100 transitions. [2022-11-16 12:47:31,360 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1100 transitions. Word has length 436 [2022-11-16 12:47:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:31,360 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 1100 transitions. [2022-11-16 12:47:31,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.071428571428573) internal successors, (351), 14 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1100 transitions. [2022-11-16 12:47:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-11-16 12:47:31,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:31,364 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:47:31,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:31,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:47:31,584 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:47:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:31,585 INFO L85 PathProgramCache]: Analyzing trace with hash 521025960, now seen corresponding path program 1 times [2022-11-16 12:47:31,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:31,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276155513] [2022-11-16 12:47:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:31,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:39,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:39,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276155513] [2022-11-16 12:47:39,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276155513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:39,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351393608] [2022-11-16 12:47:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:39,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:39,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:39,111 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:39,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:47:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:41,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 3523 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 12:47:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:44,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 12:47:45,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351393608] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:45,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:45,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6, 18] total 32 [2022-11-16 12:47:45,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079443266] [2022-11-16 12:47:45,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:45,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:47:45,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:47:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:47:45,964 INFO L87 Difference]: Start difference. First operand 665 states and 1100 transitions. Second operand has 14 states, 14 states have (on average 25.071428571428573) internal successors, (351), 14 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:54,998 INFO L93 Difference]: Finished difference Result 3172 states and 5202 transitions. [2022-11-16 12:47:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 12:47:55,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 25.071428571428573) internal successors, (351), 14 states have internal predecessors, (351), 0 states have call successors, (0), 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 436 [2022-11-16 12:47:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:55,004 INFO L225 Difference]: With dead ends: 3172 [2022-11-16 12:47:55,004 INFO L226 Difference]: Without dead ends: 2641 [2022-11-16 12:47:55,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=956, Invalid=5206, Unknown=0, NotChecked=0, Total=6162 [2022-11-16 12:47:55,008 INFO L413 NwaCegarLoop]: 936 mSDtfsCounter, 10148 mSDsluCounter, 7161 mSDsCounter, 0 mSdLazyCounter, 10909 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10148 SdHoareTripleChecker+Valid, 8097 SdHoareTripleChecker+Invalid, 11047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 10909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:55,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10148 Valid, 8097 Invalid, 11047 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 10909 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-16 12:47:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2022-11-16 12:47:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 635. [2022-11-16 12:47:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:47:55,026 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 436 [2022-11-16 12:47:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:55,026 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:47:55,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.071428571428573) internal successors, (351), 14 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:55,027 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:47:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-11-16 12:47:55,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:55,030 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:47:55,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-16 12:47:55,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:55,243 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:47:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:55,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1341651154, now seen corresponding path program 1 times [2022-11-16 12:47:55,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:55,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847958088] [2022-11-16 12:47:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:55,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:11,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:11,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847958088] [2022-11-16 12:48:11,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847958088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:11,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326474960] [2022-11-16 12:48:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:11,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:11,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:11,909 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:11,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:48:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:14,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 3526 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 12:48:14,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:17,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-16 12:48:19,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326474960] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:19,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:48:19,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 18] total 36 [2022-11-16 12:48:19,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510862487] [2022-11-16 12:48:19,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:19,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:48:19,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:19,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:48:19,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:48:19,365 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 15 states, 15 states have (on average 23.6) internal successors, (354), 15 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:33,754 INFO L93 Difference]: Finished difference Result 3643 states and 5990 transitions. [2022-11-16 12:48:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:48:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 23.6) internal successors, (354), 15 states have internal predecessors, (354), 0 states have call successors, (0), 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 437 [2022-11-16 12:48:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:33,757 INFO L225 Difference]: With dead ends: 3643 [2022-11-16 12:48:33,758 INFO L226 Difference]: Without dead ends: 3139 [2022-11-16 12:48:33,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 886 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=801, Invalid=5051, Unknown=0, NotChecked=0, Total=5852 [2022-11-16 12:48:33,761 INFO L413 NwaCegarLoop]: 1103 mSDtfsCounter, 16887 mSDsluCounter, 8134 mSDsCounter, 0 mSdLazyCounter, 19728 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16887 SdHoareTripleChecker+Valid, 9237 SdHoareTripleChecker+Invalid, 19866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 19728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:33,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16887 Valid, 9237 Invalid, 19866 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 19728 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-11-16 12:48:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2022-11-16 12:48:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 668. [2022-11-16 12:48:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.656671664167916) internal successors, (1105), 667 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1105 transitions. [2022-11-16 12:48:33,778 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1105 transitions. Word has length 437 [2022-11-16 12:48:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:33,779 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 1105 transitions. [2022-11-16 12:48:33,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 23.6) internal successors, (354), 15 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1105 transitions. [2022-11-16 12:48:33,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-11-16 12:48:33,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:33,782 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:48:33,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:34,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:34,003 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:48:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:34,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1341591572, now seen corresponding path program 1 times [2022-11-16 12:48:34,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:34,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019765708] [2022-11-16 12:48:34,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:34,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:41,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:41,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019765708] [2022-11-16 12:48:41,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019765708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:41,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801358003] [2022-11-16 12:48:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:41,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:41,280 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:41,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:48:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:43,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 3526 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-16 12:48:43,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:46,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-16 12:48:47,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801358003] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:47,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:48:47,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 19] total 34 [2022-11-16 12:48:47,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585073117] [2022-11-16 12:48:47,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:47,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:48:47,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:48:47,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:48:47,940 INFO L87 Difference]: Start difference. First operand 668 states and 1105 transitions. Second operand has 15 states, 15 states have (on average 23.6) internal successors, (354), 15 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:58,399 INFO L93 Difference]: Finished difference Result 3212 states and 5268 transitions. [2022-11-16 12:48:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 12:48:58,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 23.6) internal successors, (354), 15 states have internal predecessors, (354), 0 states have call successors, (0), 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 437 [2022-11-16 12:48:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:58,402 INFO L225 Difference]: With dead ends: 3212 [2022-11-16 12:48:58,403 INFO L226 Difference]: Without dead ends: 2675 [2022-11-16 12:48:58,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 886 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1127, Invalid=6183, Unknown=0, NotChecked=0, Total=7310 [2022-11-16 12:48:58,405 INFO L413 NwaCegarLoop]: 934 mSDtfsCounter, 10970 mSDsluCounter, 7838 mSDsCounter, 0 mSdLazyCounter, 12021 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10970 SdHoareTripleChecker+Valid, 8772 SdHoareTripleChecker+Invalid, 12159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 12021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:58,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10970 Valid, 8772 Invalid, 12159 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 12021 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-16 12:48:58,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-11-16 12:48:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 635. [2022-11-16 12:48:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:48:58,422 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 437 [2022-11-16 12:48:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:58,423 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:48:58,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 23.6) internal successors, (354), 15 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:48:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-16 12:48:58,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:58,427 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:48:58,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:58,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:58,644 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:48:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:58,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1841179898, now seen corresponding path program 1 times [2022-11-16 12:48:58,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:58,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194358543] [2022-11-16 12:48:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:58,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:06,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:06,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194358543] [2022-11-16 12:49:06,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194358543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:06,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344284977] [2022-11-16 12:49:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:06,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:06,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:06,876 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:06,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:49:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:09,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 3529 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 12:49:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:12,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-16 12:49:14,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344284977] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:14,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:49:14,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 19] total 37 [2022-11-16 12:49:14,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317400031] [2022-11-16 12:49:14,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:14,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:49:14,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:49:14,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:49:14,682 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:30,578 INFO L93 Difference]: Finished difference Result 3679 states and 6050 transitions. [2022-11-16 12:49:30,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 12:49:30,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 438 [2022-11-16 12:49:30,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:30,582 INFO L225 Difference]: With dead ends: 3679 [2022-11-16 12:49:30,582 INFO L226 Difference]: Without dead ends: 3172 [2022-11-16 12:49:30,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=929, Invalid=5713, Unknown=0, NotChecked=0, Total=6642 [2022-11-16 12:49:30,584 INFO L413 NwaCegarLoop]: 1096 mSDtfsCounter, 18914 mSDsluCounter, 8781 mSDsCounter, 0 mSdLazyCounter, 20807 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18914 SdHoareTripleChecker+Valid, 9877 SdHoareTripleChecker+Invalid, 20945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 20807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:30,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18914 Valid, 9877 Invalid, 20945 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 20807 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2022-11-16 12:49:30,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2022-11-16 12:49:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 671. [2022-11-16 12:49:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 1.6567164179104477) internal successors, (1110), 670 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1110 transitions. [2022-11-16 12:49:30,601 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1110 transitions. Word has length 438 [2022-11-16 12:49:30,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:30,602 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 1110 transitions. [2022-11-16 12:49:30,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1110 transitions. [2022-11-16 12:49:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-16 12:49:30,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:30,605 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:49:30,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:30,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:49:30,819 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:30,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1841120316, now seen corresponding path program 1 times [2022-11-16 12:49:30,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:30,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940110949] [2022-11-16 12:49:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:30,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:38,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:38,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940110949] [2022-11-16 12:49:38,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940110949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:38,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334354977] [2022-11-16 12:49:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:38,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:38,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:38,627 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:38,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:49:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:40,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 3529 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-16 12:49:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:44,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-16 12:49:46,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334354977] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:46,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:49:46,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 20] total 36 [2022-11-16 12:49:46,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246103298] [2022-11-16 12:49:46,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:46,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:49:46,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:46,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:49:46,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:49:46,098 INFO L87 Difference]: Start difference. First operand 671 states and 1110 transitions. Second operand has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:57,447 INFO L93 Difference]: Finished difference Result 3252 states and 5334 transitions. [2022-11-16 12:49:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 12:49:57,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 438 [2022-11-16 12:49:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:57,450 INFO L225 Difference]: With dead ends: 3252 [2022-11-16 12:49:57,451 INFO L226 Difference]: Without dead ends: 2709 [2022-11-16 12:49:57,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1314, Invalid=7242, Unknown=0, NotChecked=0, Total=8556 [2022-11-16 12:49:57,453 INFO L413 NwaCegarLoop]: 932 mSDtfsCounter, 11797 mSDsluCounter, 8511 mSDsCounter, 0 mSdLazyCounter, 13161 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11797 SdHoareTripleChecker+Valid, 9443 SdHoareTripleChecker+Invalid, 13299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 13161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:57,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11797 Valid, 9443 Invalid, 13299 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 13161 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-16 12:49:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2022-11-16 12:49:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 635. [2022-11-16 12:49:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:49:57,466 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 438 [2022-11-16 12:49:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:57,467 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:49:57,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.3125) internal successors, (357), 16 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:49:57,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-11-16 12:49:57,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:57,469 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:49:57,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:57,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:49:57,670 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash 499316758, now seen corresponding path program 1 times [2022-11-16 12:49:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:57,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281660342] [2022-11-16 12:49:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:04,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:04,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281660342] [2022-11-16 12:50:04,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281660342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:04,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008573116] [2022-11-16 12:50:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:04,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:04,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:04,017 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:04,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:50:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:06,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 3532 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-16 12:50:06,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:09,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 12:50:11,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008573116] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:11,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:50:11,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [7, 20] total 40 [2022-11-16 12:50:11,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139683151] [2022-11-16 12:50:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:11,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:50:11,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:50:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:50:11,932 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:29,626 INFO L93 Difference]: Finished difference Result 3715 states and 6110 transitions. [2022-11-16 12:50:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 12:50:29,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 439 [2022-11-16 12:50:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:29,631 INFO L225 Difference]: With dead ends: 3715 [2022-11-16 12:50:29,631 INFO L226 Difference]: Without dead ends: 3205 [2022-11-16 12:50:29,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1071, Invalid=6761, Unknown=0, NotChecked=0, Total=7832 [2022-11-16 12:50:29,633 INFO L413 NwaCegarLoop]: 1089 mSDtfsCounter, 20120 mSDsluCounter, 9584 mSDsCounter, 0 mSdLazyCounter, 22970 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20120 SdHoareTripleChecker+Valid, 10673 SdHoareTripleChecker+Invalid, 23108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 22970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:29,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20120 Valid, 10673 Invalid, 23108 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 22970 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2022-11-16 12:50:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2022-11-16 12:50:29,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 674. [2022-11-16 12:50:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 1.6567607726597327) internal successors, (1115), 673 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1115 transitions. [2022-11-16 12:50:29,653 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1115 transitions. Word has length 439 [2022-11-16 12:50:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:29,654 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 1115 transitions. [2022-11-16 12:50:29,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1115 transitions. [2022-11-16 12:50:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-11-16 12:50:29,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:29,657 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:50:29,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:29,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:50:29,867 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash 499376340, now seen corresponding path program 1 times [2022-11-16 12:50:29,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:29,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598713072] [2022-11-16 12:50:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:29,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:37,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:37,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598713072] [2022-11-16 12:50:37,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598713072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:37,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849585535] [2022-11-16 12:50:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:37,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:37,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:37,591 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:37,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:50:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:39,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 3532 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-16 12:50:39,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:43,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 12:50:45,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849585535] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:45,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:50:45,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6, 21] total 38 [2022-11-16 12:50:45,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561364293] [2022-11-16 12:50:45,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:45,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:50:45,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:45,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:50:45,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 12:50:45,215 INFO L87 Difference]: Start difference. First operand 674 states and 1115 transitions. Second operand has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:58,164 INFO L93 Difference]: Finished difference Result 3292 states and 5400 transitions. [2022-11-16 12:50:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-16 12:50:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 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 439 [2022-11-16 12:50:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:58,168 INFO L225 Difference]: With dead ends: 3292 [2022-11-16 12:50:58,168 INFO L226 Difference]: Without dead ends: 2743 [2022-11-16 12:50:58,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 991 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1514, Invalid=8386, Unknown=0, NotChecked=0, Total=9900 [2022-11-16 12:50:58,171 INFO L413 NwaCegarLoop]: 930 mSDtfsCounter, 12629 mSDsluCounter, 9180 mSDsCounter, 0 mSdLazyCounter, 14329 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12629 SdHoareTripleChecker+Valid, 10110 SdHoareTripleChecker+Invalid, 14467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 14329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:58,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12629 Valid, 10110 Invalid, 14467 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 14329 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-11-16 12:50:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2022-11-16 12:50:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 635. [2022-11-16 12:50:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:50:58,187 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 439 [2022-11-16 12:50:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:58,187 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:50:58,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.176470588235293) internal successors, (360), 17 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:50:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-11-16 12:50:58,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:58,191 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:50:58,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:58,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:50:58,407 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:58,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:58,408 INFO L85 PathProgramCache]: Analyzing trace with hash 253668384, now seen corresponding path program 1 times [2022-11-16 12:50:58,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:58,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594999221] [2022-11-16 12:50:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:58,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:06,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:06,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594999221] [2022-11-16 12:51:06,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594999221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:06,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436518750] [2022-11-16 12:51:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:06,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:06,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:06,754 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:51:06,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:51:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:09,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 3535 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-16 12:51:09,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:13,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-16 12:51:15,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436518750] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:15,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:51:15,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 21] total 41 [2022-11-16 12:51:15,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563033115] [2022-11-16 12:51:15,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:15,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:51:15,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:51:15,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:51:15,373 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 18 states, 18 states have (on average 20.166666666666668) internal successors, (363), 18 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:34,209 INFO L93 Difference]: Finished difference Result 3751 states and 6170 transitions. [2022-11-16 12:51:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-16 12:51:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.166666666666668) internal successors, (363), 18 states have internal predecessors, (363), 0 states have call successors, (0), 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 440 [2022-11-16 12:51:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:34,213 INFO L225 Difference]: With dead ends: 3751 [2022-11-16 12:51:34,213 INFO L226 Difference]: Without dead ends: 3238 [2022-11-16 12:51:34,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1219, Invalid=7523, Unknown=0, NotChecked=0, Total=8742 [2022-11-16 12:51:34,216 INFO L413 NwaCegarLoop]: 1082 mSDtfsCounter, 21744 mSDsluCounter, 10306 mSDsCounter, 0 mSdLazyCounter, 24594 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21744 SdHoareTripleChecker+Valid, 11388 SdHoareTripleChecker+Invalid, 24732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 24594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:34,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21744 Valid, 11388 Invalid, 24732 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 24594 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2022-11-16 12:51:34,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2022-11-16 12:51:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 677. [2022-11-16 12:51:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.6568047337278107) internal successors, (1120), 676 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1120 transitions. [2022-11-16 12:51:34,237 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1120 transitions. Word has length 440 [2022-11-16 12:51:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:34,237 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 1120 transitions. [2022-11-16 12:51:34,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.166666666666668) internal successors, (363), 18 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1120 transitions. [2022-11-16 12:51:34,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-11-16 12:51:34,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:34,241 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:51:34,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:34,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:34,455 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:51:34,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:34,456 INFO L85 PathProgramCache]: Analyzing trace with hash 253727966, now seen corresponding path program 1 times [2022-11-16 12:51:34,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:34,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624438477] [2022-11-16 12:51:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:34,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:40,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624438477] [2022-11-16 12:51:40,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624438477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570931666] [2022-11-16 12:51:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:40,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:40,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:40,819 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:51:40,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 12:51:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:43,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 3535 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-16 12:51:43,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:47,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-16 12:51:49,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570931666] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:49,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:51:49,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [7, 22] total 40 [2022-11-16 12:51:49,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776043177] [2022-11-16 12:51:49,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:49,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:51:49,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:49,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:51:49,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:51:49,100 INFO L87 Difference]: Start difference. First operand 677 states and 1120 transitions. Second operand has 18 states, 18 states have (on average 20.166666666666668) internal successors, (363), 18 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:52:03,472 INFO L93 Difference]: Finished difference Result 3332 states and 5466 transitions. [2022-11-16 12:52:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 12:52:03,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.166666666666668) internal successors, (363), 18 states have internal predecessors, (363), 0 states have call successors, (0), 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 440 [2022-11-16 12:52:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:52:03,475 INFO L225 Difference]: With dead ends: 3332 [2022-11-16 12:52:03,475 INFO L226 Difference]: Without dead ends: 2777 [2022-11-16 12:52:03,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1727, Invalid=9615, Unknown=0, NotChecked=0, Total=11342 [2022-11-16 12:52:03,477 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 13466 mSDsluCounter, 9845 mSDsCounter, 0 mSdLazyCounter, 15525 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13466 SdHoareTripleChecker+Valid, 10773 SdHoareTripleChecker+Invalid, 15663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 15525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:52:03,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13466 Valid, 10773 Invalid, 15663 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 15525 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-16 12:52:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2022-11-16 12:52:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 635. [2022-11-16 12:52:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-16 12:52:03,494 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 440 [2022-11-16 12:52:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:52:03,495 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-16 12:52:03,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.166666666666668) internal successors, (363), 18 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-16 12:52:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-11-16 12:52:03,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:52:03,497 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:52:03,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:03,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:03,699 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:52:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:03,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2056107004, now seen corresponding path program 1 times [2022-11-16 12:52:03,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:03,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737776047] [2022-11-16 12:52:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:03,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:10,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:10,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737776047] [2022-11-16 12:52:10,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737776047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:10,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420642502] [2022-11-16 12:52:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:10,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:10,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:10,862 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:10,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 12:52:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:13,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 3538 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-16 12:52:13,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:17,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-16 12:52:19,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420642502] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:19,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:52:19,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 22] total 43 [2022-11-16 12:52:19,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256711975] [2022-11-16 12:52:19,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:19,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:52:19,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:19,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:52:19,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:52:19,698 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 19 states, 19 states have (on average 19.263157894736842) internal successors, (366), 19 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:52:39,746 INFO L93 Difference]: Finished difference Result 3787 states and 6230 transitions. [2022-11-16 12:52:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 12:52:39,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.263157894736842) internal successors, (366), 19 states have internal predecessors, (366), 0 states have call successors, (0), 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 441 [2022-11-16 12:52:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:52:39,749 INFO L225 Difference]: With dead ends: 3787 [2022-11-16 12:52:39,749 INFO L226 Difference]: Without dead ends: 3271 [2022-11-16 12:52:39,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1379, Invalid=8521, Unknown=0, NotChecked=0, Total=9900 [2022-11-16 12:52:39,752 INFO L413 NwaCegarLoop]: 1075 mSDtfsCounter, 23786 mSDsluCounter, 10944 mSDsCounter, 0 mSdLazyCounter, 25658 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23786 SdHoareTripleChecker+Valid, 12019 SdHoareTripleChecker+Invalid, 25796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 25658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:52:39,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23786 Valid, 12019 Invalid, 25796 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 25658 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time] [2022-11-16 12:52:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2022-11-16 12:52:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 680. [2022-11-16 12:52:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.6568483063328425) internal successors, (1125), 679 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1125 transitions. [2022-11-16 12:52:39,770 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1125 transitions. Word has length 441 [2022-11-16 12:52:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:52:39,771 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 1125 transitions. [2022-11-16 12:52:39,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.263157894736842) internal successors, (366), 19 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1125 transitions. [2022-11-16 12:52:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-11-16 12:52:39,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:52:39,774 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:52:39,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-16 12:52:39,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:39,991 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:52:39,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:39,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2056166586, now seen corresponding path program 1 times [2022-11-16 12:52:39,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:39,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168822193] [2022-11-16 12:52:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:39,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:48,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:48,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168822193] [2022-11-16 12:52:48,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168822193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:48,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906537029] [2022-11-16 12:52:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:48,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:48,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:48,207 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:48,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d26db7-1821-4d50-8854-c3c8e9b24839/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 12:52:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 3538 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-16 12:52:50,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:54,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-16 12:52:56,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906537029] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:56,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:52:56,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23] total 42 [2022-11-16 12:52:56,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024822759] [2022-11-16 12:52:56,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:56,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:52:56,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:56,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:52:56,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1612, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 12:52:56,611 INFO L87 Difference]: Start difference. First operand 680 states and 1125 transitions. Second operand has 19 states, 19 states have (on average 19.263157894736842) internal successors, (366), 19 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)