./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3ca7ac045e48d38881d30e6a93ef4c7dacfed0b5d9d8607f5d28bf43102d8b7 --- 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-b5237d8 [2022-11-22 01:48:34,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:48:34,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:48:34,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:48:34,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:48:34,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:48:34,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:48:34,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:48:34,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:48:34,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:48:34,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:48:34,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:48:34,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:48:34,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:48:34,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:48:34,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:48:34,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:48:34,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:48:34,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:48:34,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:48:34,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:48:34,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:48:34,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:48:34,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:48:34,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:48:34,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:48:34,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:48:34,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:48:34,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:48:34,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:48:34,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:48:34,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:48:34,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:48:34,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:48:34,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:48:34,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:48:34,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:48:34,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:48:34,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:48:34,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:48:34,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:48:34,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:48:34,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:48:34,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:48:34,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:48:34,545 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:48:34,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:48:34,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:48:34,547 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:48:34,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:48:34,548 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:48:34,548 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:48:34,549 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:48:34,550 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:48:34,550 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:48:34,550 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:48:34,550 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:48:34,551 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:48:34,551 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:48:34,551 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:48:34,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:48:34,552 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:48:34,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:48:34,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:48:34,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:48:34,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:48:34,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:48:34,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:48:34,555 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:48:34,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:48:34,556 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:48:34,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:48:34,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:48:34,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:48:34,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:48:34,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:48:34,558 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:48:34,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:48:34,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:48:34,558 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:48:34,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:48:34,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:48:34,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:48:34,561 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_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3ca7ac045e48d38881d30e6a93ef4c7dacfed0b5d9d8607f5d28bf43102d8b7 [2022-11-22 01:48:34,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:48:34,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:48:34,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:48:34,988 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:48:34,989 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:48:34,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/eca-rers2012/Problem03_label16.c [2022-11-22 01:48:38,505 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:48:38,858 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:48:38,858 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/sv-benchmarks/c/eca-rers2012/Problem03_label16.c [2022-11-22 01:48:38,873 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/data/2f887b97d/cf110f576460432fa5d89f991dc2056b/FLAG9c8fd0ac2 [2022-11-22 01:48:38,894 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/data/2f887b97d/cf110f576460432fa5d89f991dc2056b [2022-11-22 01:48:38,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:48:38,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:48:38,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:48:38,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:48:38,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:48:38,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:48:38" (1/1) ... [2022-11-22 01:48:38,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48aca748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:38, skipping insertion in model container [2022-11-22 01:48:38,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:48:38" (1/1) ... [2022-11-22 01:48:38,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:48:39,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:48:39,588 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/sv-benchmarks/c/eca-rers2012/Problem03_label16.c[56490,56503] [2022-11-22 01:48:39,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:48:39,642 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:48:39,882 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/sv-benchmarks/c/eca-rers2012/Problem03_label16.c[56490,56503] [2022-11-22 01:48:39,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:48:39,913 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:48:39,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39 WrapperNode [2022-11-22 01:48:39,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:48:39,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:48:39,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:48:39,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:48:39,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:39,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:40,094 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-22 01:48:40,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:48:40,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:48:40,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:48:40,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:48:40,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:40,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:40,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:40,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:40,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:40,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:40,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:40,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:40,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:48:40,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:48:40,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:48:40,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:48:40,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (1/1) ... [2022-11-22 01:48:40,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:48:40,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:48:40,337 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:48:40,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:48:40,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:48:40,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:48:40,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:48:40,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:48:40,502 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:48:40,505 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:48:42,550 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:48:42,968 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:48:42,968 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:48:42,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:48:42 BoogieIcfgContainer [2022-11-22 01:48:42,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:48:42,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:48:42,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:48:42,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:48:42,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:48:38" (1/3) ... [2022-11-22 01:48:42,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190e5659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:48:42, skipping insertion in model container [2022-11-22 01:48:42,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:39" (2/3) ... [2022-11-22 01:48:42,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190e5659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:48:42, skipping insertion in model container [2022-11-22 01:48:42,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:48:42" (3/3) ... [2022-11-22 01:48:42,992 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label16.c [2022-11-22 01:48:43,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:48:43,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:48:43,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:48:43,091 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=FINITE_AUTOMATA, 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;@4bda499f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:48:43,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:48:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 01:48:43,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:43,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:48:43,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:43,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:43,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1724864008, now seen corresponding path program 1 times [2022-11-22 01:48:43,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:43,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116467865] [2022-11-22 01:48:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:43,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:48:44,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:44,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116467865] [2022-11-22 01:48:44,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116467865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:44,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:48:44,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:48:44,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996978801] [2022-11-22 01:48:44,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:44,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:48:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:48:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:44,273 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:45,406 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-22 01:48:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:48:45,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-22 01:48:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:45,421 INFO L225 Difference]: With dead ends: 440 [2022-11-22 01:48:45,422 INFO L226 Difference]: Without dead ends: 289 [2022-11-22 01:48:45,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:45,428 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:45,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 53 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:48:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-22 01:48:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-22 01:48:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8090277777777777) internal successors, (521), 288 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 521 transitions. [2022-11-22 01:48:45,483 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 521 transitions. Word has length 143 [2022-11-22 01:48:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:45,484 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 521 transitions. [2022-11-22 01:48:45,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 521 transitions. [2022-11-22 01:48:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-22 01:48:45,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:45,488 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:48:45,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:48:45,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:45,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1763838799, now seen corresponding path program 1 times [2022-11-22 01:48:45,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:45,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805070748] [2022-11-22 01:48:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:45,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:48:45,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:45,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805070748] [2022-11-22 01:48:45,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805070748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:45,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:48:45,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:48:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970130457] [2022-11-22 01:48:45,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:45,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:48:45,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:45,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:48:45,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:45,878 INFO L87 Difference]: Start difference. First operand 289 states and 521 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:46,716 INFO L93 Difference]: Finished difference Result 865 states and 1561 transitions. [2022-11-22 01:48:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:48:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-11-22 01:48:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:46,720 INFO L225 Difference]: With dead ends: 865 [2022-11-22 01:48:46,720 INFO L226 Difference]: Without dead ends: 577 [2022-11-22 01:48:46,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:46,722 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 179 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:46,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 57 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:48:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-22 01:48:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2022-11-22 01:48:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7822299651567943) internal successors, (1023), 574 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1023 transitions. [2022-11-22 01:48:46,778 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1023 transitions. Word has length 147 [2022-11-22 01:48:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:46,780 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1023 transitions. [2022-11-22 01:48:46,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1023 transitions. [2022-11-22 01:48:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-22 01:48:46,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:46,786 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 01:48:46,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:48:46,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:46,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:46,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1826151602, now seen corresponding path program 1 times [2022-11-22 01:48:46,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:46,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949224272] [2022-11-22 01:48:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:46,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:48:47,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:47,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949224272] [2022-11-22 01:48:47,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949224272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:48:47,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145512742] [2022-11-22 01:48:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:47,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:48:47,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:48:47,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:48:47,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:48:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:47,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:48:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:48:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:48:47,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:48:47,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145512742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:47,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:48:47,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:48:47,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212343409] [2022-11-22 01:48:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:47,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:48:47,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:48:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:48:47,914 INFO L87 Difference]: Start difference. First operand 575 states and 1023 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:48,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:48,747 INFO L93 Difference]: Finished difference Result 1721 states and 3066 transitions. [2022-11-22 01:48:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:48:48,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-11-22 01:48:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:48,752 INFO L225 Difference]: With dead ends: 1721 [2022-11-22 01:48:48,753 INFO L226 Difference]: Without dead ends: 1147 [2022-11-22 01:48:48,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:48:48,756 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:48,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 276 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:48:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-22 01:48:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-11-22 01:48:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.7216404886561956) internal successors, (1973), 1146 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1973 transitions. [2022-11-22 01:48:48,786 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1973 transitions. Word has length 154 [2022-11-22 01:48:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:48,786 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1973 transitions. [2022-11-22 01:48:48,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1973 transitions. [2022-11-22 01:48:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-22 01:48:48,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:48,790 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:48:48,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:48:48,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:48:48,997 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:48,997 INFO L85 PathProgramCache]: Analyzing trace with hash 649494380, now seen corresponding path program 1 times [2022-11-22 01:48:48,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:48,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281424565] [2022-11-22 01:48:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:48,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:48:49,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:49,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281424565] [2022-11-22 01:48:49,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281424565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:49,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:48:49,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:48:49,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445200241] [2022-11-22 01:48:49,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:49,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:48:49,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:48:49,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:49,263 INFO L87 Difference]: Start difference. First operand 1147 states and 1973 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:50,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:50,174 INFO L93 Difference]: Finished difference Result 3437 states and 5916 transitions. [2022-11-22 01:48:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:48:50,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-11-22 01:48:50,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:50,190 INFO L225 Difference]: With dead ends: 3437 [2022-11-22 01:48:50,190 INFO L226 Difference]: Without dead ends: 2291 [2022-11-22 01:48:50,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:50,193 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 156 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:50,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 66 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:48:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-11-22 01:48:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1719. [2022-11-22 01:48:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.6414435389988358) internal successors, (2820), 1718 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2820 transitions. [2022-11-22 01:48:50,244 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2820 transitions. Word has length 156 [2022-11-22 01:48:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:50,244 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2820 transitions. [2022-11-22 01:48:50,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2820 transitions. [2022-11-22 01:48:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-22 01:48:50,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:50,249 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2022-11-22 01:48:50,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:48:50,250 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1653351762, now seen corresponding path program 1 times [2022-11-22 01:48:50,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:50,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318846277] [2022-11-22 01:48:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:50,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:48:50,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318846277] [2022-11-22 01:48:50,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318846277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:50,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:48:50,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:48:50,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49037670] [2022-11-22 01:48:50,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:50,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:48:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:50,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:48:50,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:50,481 INFO L87 Difference]: Start difference. First operand 1719 states and 2820 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:51,345 INFO L93 Difference]: Finished difference Result 5153 states and 8457 transitions. [2022-11-22 01:48:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:48:51,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2022-11-22 01:48:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:51,360 INFO L225 Difference]: With dead ends: 5153 [2022-11-22 01:48:51,365 INFO L226 Difference]: Without dead ends: 3435 [2022-11-22 01:48:51,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:51,370 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 148 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:51,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 45 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:48:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-11-22 01:48:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-11-22 01:48:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.604834012813046) internal successors, (5511), 3434 states have internal predecessors, (5511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 5511 transitions. [2022-11-22 01:48:51,471 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 5511 transitions. Word has length 161 [2022-11-22 01:48:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:51,471 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 5511 transitions. [2022-11-22 01:48:51,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 5511 transitions. [2022-11-22 01:48:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-22 01:48:51,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:51,478 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:48:51,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:48:51,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:51,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:51,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1856287371, now seen corresponding path program 1 times [2022-11-22 01:48:51,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:51,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043129777] [2022-11-22 01:48:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:51,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:48:51,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:51,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043129777] [2022-11-22 01:48:51,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043129777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:51,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:48:51,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:48:51,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583796665] [2022-11-22 01:48:51,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:51,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:48:51,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:48:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:51,927 INFO L87 Difference]: Start difference. First operand 3435 states and 5511 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:52,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:52,851 INFO L93 Difference]: Finished difference Result 8585 states and 13691 transitions. [2022-11-22 01:48:52,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:48:52,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 168 [2022-11-22 01:48:52,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:52,871 INFO L225 Difference]: With dead ends: 8585 [2022-11-22 01:48:52,872 INFO L226 Difference]: Without dead ends: 5151 [2022-11-22 01:48:52,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:52,880 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 142 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:52,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 263 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:48:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2022-11-22 01:48:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 5151. [2022-11-22 01:48:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5151 states, 5150 states have (on average 1.5155339805825243) internal successors, (7805), 5150 states have internal predecessors, (7805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 7805 transitions. [2022-11-22 01:48:53,017 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 7805 transitions. Word has length 168 [2022-11-22 01:48:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:53,017 INFO L495 AbstractCegarLoop]: Abstraction has 5151 states and 7805 transitions. [2022-11-22 01:48:53,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 7805 transitions. [2022-11-22 01:48:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-22 01:48:53,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:53,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:48:53,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:48:53,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1990528322, now seen corresponding path program 1 times [2022-11-22 01:48:53,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:53,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145325407] [2022-11-22 01:48:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:53,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:48:53,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:53,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145325407] [2022-11-22 01:48:53,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145325407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:53,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:48:53,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:48:53,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809117372] [2022-11-22 01:48:53,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:53,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:48:53,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:53,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:48:53,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:53,531 INFO L87 Difference]: Start difference. First operand 5151 states and 7805 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:54,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:54,554 INFO L93 Difference]: Finished difference Result 15022 states and 22838 transitions. [2022-11-22 01:48:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:48:54,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 177 [2022-11-22 01:48:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:54,595 INFO L225 Difference]: With dead ends: 15022 [2022-11-22 01:48:54,595 INFO L226 Difference]: Without dead ends: 9872 [2022-11-22 01:48:54,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:54,602 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 138 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:54,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 72 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:48:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9872 states. [2022-11-22 01:48:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9872 to 9870. [2022-11-22 01:48:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9870 states, 9869 states have (on average 1.464687405005573) internal successors, (14455), 9869 states have internal predecessors, (14455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9870 states to 9870 states and 14455 transitions. [2022-11-22 01:48:54,829 INFO L78 Accepts]: Start accepts. Automaton has 9870 states and 14455 transitions. Word has length 177 [2022-11-22 01:48:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:54,830 INFO L495 AbstractCegarLoop]: Abstraction has 9870 states and 14455 transitions. [2022-11-22 01:48:54,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 9870 states and 14455 transitions. [2022-11-22 01:48:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-22 01:48:54,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:54,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:48:54,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:48:54,844 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash 624222332, now seen corresponding path program 1 times [2022-11-22 01:48:54,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:54,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379770916] [2022-11-22 01:48:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:54,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 01:48:55,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:55,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379770916] [2022-11-22 01:48:55,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379770916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:55,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:48:55,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:48:55,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394555817] [2022-11-22 01:48:55,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:55,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:48:55,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:55,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:48:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:55,079 INFO L87 Difference]: Start difference. First operand 9870 states and 14455 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:56,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:56,056 INFO L93 Difference]: Finished difference Result 26031 states and 38559 transitions. [2022-11-22 01:48:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:48:56,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 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 191 [2022-11-22 01:48:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:56,112 INFO L225 Difference]: With dead ends: 26031 [2022-11-22 01:48:56,112 INFO L226 Difference]: Without dead ends: 16162 [2022-11-22 01:48:56,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:56,126 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 138 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:56,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 104 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:48:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16162 states. [2022-11-22 01:48:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16162 to 13731. [2022-11-22 01:48:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13731 states, 13730 states have (on average 1.3419519300801166) internal successors, (18425), 13730 states have internal predecessors, (18425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13731 states to 13731 states and 18425 transitions. [2022-11-22 01:48:56,534 INFO L78 Accepts]: Start accepts. Automaton has 13731 states and 18425 transitions. Word has length 191 [2022-11-22 01:48:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:56,534 INFO L495 AbstractCegarLoop]: Abstraction has 13731 states and 18425 transitions. [2022-11-22 01:48:56,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 13731 states and 18425 transitions. [2022-11-22 01:48:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-11-22 01:48:56,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:56,555 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-22 01:48:56,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:48:56,555 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1705125675, now seen corresponding path program 1 times [2022-11-22 01:48:56,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:56,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581640466] [2022-11-22 01:48:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:56,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:48:56,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:56,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581640466] [2022-11-22 01:48:56,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581640466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:56,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:48:56,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:48:56,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239551327] [2022-11-22 01:48:56,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:56,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:48:56,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:48:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:57,000 INFO L87 Difference]: Start difference. First operand 13731 states and 18425 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:58,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:58,059 INFO L93 Difference]: Finished difference Result 28462 states and 38252 transitions. [2022-11-22 01:48:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:48:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 201 [2022-11-22 01:48:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:58,091 INFO L225 Difference]: With dead ends: 28462 [2022-11-22 01:48:58,091 INFO L226 Difference]: Without dead ends: 15161 [2022-11-22 01:48:58,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:58,107 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:58,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 245 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:48:58,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15161 states. [2022-11-22 01:48:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15161 to 15018. [2022-11-22 01:48:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15018 states, 15017 states have (on average 1.307717919691017) internal successors, (19638), 15017 states have internal predecessors, (19638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15018 states to 15018 states and 19638 transitions. [2022-11-22 01:48:58,445 INFO L78 Accepts]: Start accepts. Automaton has 15018 states and 19638 transitions. Word has length 201 [2022-11-22 01:48:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:58,445 INFO L495 AbstractCegarLoop]: Abstraction has 15018 states and 19638 transitions. [2022-11-22 01:48:58,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:58,446 INFO L276 IsEmpty]: Start isEmpty. Operand 15018 states and 19638 transitions. [2022-11-22 01:48:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-22 01:48:58,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:58,465 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:48:58,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:48:58,466 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:58,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1211888839, now seen corresponding path program 1 times [2022-11-22 01:48:58,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:58,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034797052] [2022-11-22 01:48:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:58,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 01:48:58,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034797052] [2022-11-22 01:48:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034797052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:58,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:48:58,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:48:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187050403] [2022-11-22 01:48:58,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:58,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:48:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:48:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:48:58,995 INFO L87 Difference]: Start difference. First operand 15018 states and 19638 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:00,127 INFO L93 Difference]: Finished difference Result 39761 states and 52099 transitions. [2022-11-22 01:49:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:00,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 211 [2022-11-22 01:49:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:00,182 INFO L225 Difference]: With dead ends: 39761 [2022-11-22 01:49:00,183 INFO L226 Difference]: Without dead ends: 25173 [2022-11-22 01:49:00,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:49:00,201 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 155 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:00,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 108 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:49:00,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25173 states. [2022-11-22 01:49:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25173 to 25171. [2022-11-22 01:49:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25171 states, 25170 states have (on average 1.298927294398093) internal successors, (32694), 25170 states have internal predecessors, (32694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25171 states to 25171 states and 32694 transitions. [2022-11-22 01:49:00,847 INFO L78 Accepts]: Start accepts. Automaton has 25171 states and 32694 transitions. Word has length 211 [2022-11-22 01:49:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:00,848 INFO L495 AbstractCegarLoop]: Abstraction has 25171 states and 32694 transitions. [2022-11-22 01:49:00,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 25171 states and 32694 transitions. [2022-11-22 01:49:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-22 01:49:00,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:00,874 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 01:49:00,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:49:00,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:00,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:00,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1830631802, now seen corresponding path program 1 times [2022-11-22 01:49:00,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:00,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843670286] [2022-11-22 01:49:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:00,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 01:49:01,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:01,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843670286] [2022-11-22 01:49:01,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843670286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:01,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:01,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:49:01,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637551024] [2022-11-22 01:49:01,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:01,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:49:01,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:01,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:49:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:49:01,504 INFO L87 Difference]: Start difference. First operand 25171 states and 32694 transitions. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:03,122 INFO L93 Difference]: Finished difference Result 49483 states and 64418 transitions. [2022-11-22 01:49:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:49:03,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 217 [2022-11-22 01:49:03,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:03,178 INFO L225 Difference]: With dead ends: 49483 [2022-11-22 01:49:03,178 INFO L226 Difference]: Without dead ends: 25171 [2022-11-22 01:49:03,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:49:03,198 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 260 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:03,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 98 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 01:49:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25171 states. [2022-11-22 01:49:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25171 to 24599. [2022-11-22 01:49:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24599 states, 24598 states have (on average 1.2989673957232295) internal successors, (31952), 24598 states have internal predecessors, (31952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24599 states to 24599 states and 31952 transitions. [2022-11-22 01:49:03,639 INFO L78 Accepts]: Start accepts. Automaton has 24599 states and 31952 transitions. Word has length 217 [2022-11-22 01:49:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:03,640 INFO L495 AbstractCegarLoop]: Abstraction has 24599 states and 31952 transitions. [2022-11-22 01:49:03,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 24599 states and 31952 transitions. [2022-11-22 01:49:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-22 01:49:03,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:03,661 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:03,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:49:03,661 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1297557929, now seen corresponding path program 1 times [2022-11-22 01:49:03,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:03,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653211827] [2022-11-22 01:49:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:03,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-22 01:49:04,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:04,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653211827] [2022-11-22 01:49:04,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653211827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:49:04,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157039496] [2022-11-22 01:49:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:04,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:04,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:04,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:49:04,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:49:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:04,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:49:04,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-22 01:49:04,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:49:04,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157039496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:04,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:49:04,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:49:04,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184792594] [2022-11-22 01:49:04,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:04,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:04,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:04,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:04,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:04,811 INFO L87 Difference]: Start difference. First operand 24599 states and 31952 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:06,008 INFO L93 Difference]: Finished difference Result 50484 states and 66112 transitions. [2022-11-22 01:49:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:06,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 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 224 [2022-11-22 01:49:06,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:06,054 INFO L225 Difference]: With dead ends: 50484 [2022-11-22 01:49:06,054 INFO L226 Difference]: Without dead ends: 26029 [2022-11-22 01:49:06,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:06,068 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:06,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 205 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:49:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26029 states. [2022-11-22 01:49:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26029 to 26029. [2022-11-22 01:49:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26029 states, 26028 states have (on average 1.3009451360073767) internal successors, (33861), 26028 states have internal predecessors, (33861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26029 states to 26029 states and 33861 transitions. [2022-11-22 01:49:06,493 INFO L78 Accepts]: Start accepts. Automaton has 26029 states and 33861 transitions. Word has length 224 [2022-11-22 01:49:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:06,494 INFO L495 AbstractCegarLoop]: Abstraction has 26029 states and 33861 transitions. [2022-11-22 01:49:06,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 26029 states and 33861 transitions. [2022-11-22 01:49:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-22 01:49:06,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:06,519 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 01:49:06,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:49:06,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:06,726 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1498107534, now seen corresponding path program 1 times [2022-11-22 01:49:06,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:06,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949237225] [2022-11-22 01:49:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 101 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 01:49:07,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:07,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949237225] [2022-11-22 01:49:07,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949237225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:49:07,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011043930] [2022-11-22 01:49:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:07,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:07,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:07,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:49:07,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:49:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:49:07,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 01:49:07,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:49:07,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011043930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:07,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:49:07,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:49:07,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229210918] [2022-11-22 01:49:07,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:07,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:07,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:07,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:07,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:07,717 INFO L87 Difference]: Start difference. First operand 26029 states and 33861 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:08,450 INFO L93 Difference]: Finished difference Result 56921 states and 74863 transitions. [2022-11-22 01:49:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2022-11-22 01:49:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:08,521 INFO L225 Difference]: With dead ends: 56921 [2022-11-22 01:49:08,522 INFO L226 Difference]: Without dead ends: 40903 [2022-11-22 01:49:08,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:08,543 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 208 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:08,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 555 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:49:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40903 states. [2022-11-22 01:49:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40903 to 40901. [2022-11-22 01:49:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40901 states, 40900 states have (on average 1.2869682151589241) internal successors, (52637), 40900 states have internal predecessors, (52637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40901 states to 40901 states and 52637 transitions. [2022-11-22 01:49:09,449 INFO L78 Accepts]: Start accepts. Automaton has 40901 states and 52637 transitions. Word has length 228 [2022-11-22 01:49:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:09,449 INFO L495 AbstractCegarLoop]: Abstraction has 40901 states and 52637 transitions. [2022-11-22 01:49:09,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 40901 states and 52637 transitions. [2022-11-22 01:49:09,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-22 01:49:09,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:09,483 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 01:49:09,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:49:09,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 01:49:09,690 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:09,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1649008240, now seen corresponding path program 1 times [2022-11-22 01:49:09,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:09,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930853067] [2022-11-22 01:49:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:09,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:49:10,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:10,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930853067] [2022-11-22 01:49:10,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930853067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:10,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:10,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:49:10,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132912333] [2022-11-22 01:49:10,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:10,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:10,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:10,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:49:10,123 INFO L87 Difference]: Start difference. First operand 40901 states and 52637 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:11,443 INFO L93 Difference]: Finished difference Result 79229 states and 102323 transitions. [2022-11-22 01:49:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:11,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 228 [2022-11-22 01:49:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:11,509 INFO L225 Difference]: With dead ends: 79229 [2022-11-22 01:49:11,509 INFO L226 Difference]: Without dead ends: 48339 [2022-11-22 01:49:11,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:49:11,533 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:11,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 131 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:49:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48339 states. [2022-11-22 01:49:12,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48339 to 48337. [2022-11-22 01:49:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48337 states, 48336 states have (on average 1.2870945051307514) internal successors, (62213), 48336 states have internal predecessors, (62213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48337 states to 48337 states and 62213 transitions. [2022-11-22 01:49:12,285 INFO L78 Accepts]: Start accepts. Automaton has 48337 states and 62213 transitions. Word has length 228 [2022-11-22 01:49:12,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:12,286 INFO L495 AbstractCegarLoop]: Abstraction has 48337 states and 62213 transitions. [2022-11-22 01:49:12,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 48337 states and 62213 transitions. [2022-11-22 01:49:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-22 01:49:12,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:12,315 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:12,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 01:49:12,316 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:12,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1981972659, now seen corresponding path program 1 times [2022-11-22 01:49:12,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:12,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561554100] [2022-11-22 01:49:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:12,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 103 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-22 01:49:12,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:12,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561554100] [2022-11-22 01:49:12,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561554100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:49:12,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071524058] [2022-11-22 01:49:12,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:12,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:12,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:12,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:49:12,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:49:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:12,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:49:12,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 01:49:13,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:49:13,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071524058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:13,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:49:13,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:49:13,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969685950] [2022-11-22 01:49:13,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:13,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:13,166 INFO L87 Difference]: Start difference. First operand 48337 states and 62213 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:14,321 INFO L93 Difference]: Finished difference Result 103966 states and 135945 transitions. [2022-11-22 01:49:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-22 01:49:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:14,384 INFO L225 Difference]: With dead ends: 103966 [2022-11-22 01:49:14,385 INFO L226 Difference]: Without dead ends: 56488 [2022-11-22 01:49:14,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:14,414 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 125 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:14,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 253 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:49:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56488 states. [2022-11-22 01:49:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56488 to 51340. [2022-11-22 01:49:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51340 states, 51339 states have (on average 1.2546991565866106) internal successors, (64415), 51339 states have internal predecessors, (64415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51340 states to 51340 states and 64415 transitions. [2022-11-22 01:49:15,164 INFO L78 Accepts]: Start accepts. Automaton has 51340 states and 64415 transitions. Word has length 230 [2022-11-22 01:49:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:15,164 INFO L495 AbstractCegarLoop]: Abstraction has 51340 states and 64415 transitions. [2022-11-22 01:49:15,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 51340 states and 64415 transitions. [2022-11-22 01:49:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-22 01:49:15,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:15,195 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:15,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 01:49:15,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 01:49:15,402 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -130453332, now seen corresponding path program 1 times [2022-11-22 01:49:15,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:15,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835583031] [2022-11-22 01:49:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:15,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 116 proven. 6 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-22 01:49:16,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:16,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835583031] [2022-11-22 01:49:16,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835583031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:49:16,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491506745] [2022-11-22 01:49:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:16,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:16,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:16,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:49:16,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:49:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:16,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:49:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-22 01:49:16,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:49:16,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491506745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:16,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:49:16,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-22 01:49:16,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430098398] [2022-11-22 01:49:16,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:16,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:16,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:16,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:16,818 INFO L87 Difference]: Start difference. First operand 51340 states and 64415 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:17,684 INFO L93 Difference]: Finished difference Result 87378 states and 109390 transitions. [2022-11-22 01:49:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:17,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 242 [2022-11-22 01:49:17,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:17,723 INFO L225 Difference]: With dead ends: 87378 [2022-11-22 01:49:17,723 INFO L226 Difference]: Without dead ends: 36897 [2022-11-22 01:49:17,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:17,740 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:17,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:49:17,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36897 states. [2022-11-22 01:49:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36897 to 36325. [2022-11-22 01:49:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36325 states, 36324 states have (on average 1.2102466688690672) internal successors, (43961), 36324 states have internal predecessors, (43961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:18,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36325 states to 36325 states and 43961 transitions. [2022-11-22 01:49:18,309 INFO L78 Accepts]: Start accepts. Automaton has 36325 states and 43961 transitions. Word has length 242 [2022-11-22 01:49:18,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:18,310 INFO L495 AbstractCegarLoop]: Abstraction has 36325 states and 43961 transitions. [2022-11-22 01:49:18,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:18,310 INFO L276 IsEmpty]: Start isEmpty. Operand 36325 states and 43961 transitions. [2022-11-22 01:49:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-22 01:49:18,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:18,328 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 01:49:18,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:49:18,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 01:49:18,535 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:18,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:18,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1061541960, now seen corresponding path program 1 times [2022-11-22 01:49:18,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:18,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9166427] [2022-11-22 01:49:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:18,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 108 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:49:19,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9166427] [2022-11-22 01:49:19,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9166427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:49:19,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372762694] [2022-11-22 01:49:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:19,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:19,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:19,298 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:49:19,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:49:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:19,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:49:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:49:19,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:49:19,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372762694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:19,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:49:19,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:49:19,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935831657] [2022-11-22 01:49:19,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:19,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:19,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:19,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:19,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:19,886 INFO L87 Difference]: Start difference. First operand 36325 states and 43961 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:20,844 INFO L93 Difference]: Finished difference Result 72649 states and 88962 transitions. [2022-11-22 01:49:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:20,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 249 [2022-11-22 01:49:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:20,905 INFO L225 Difference]: With dead ends: 72649 [2022-11-22 01:49:20,906 INFO L226 Difference]: Without dead ends: 38184 [2022-11-22 01:49:20,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:20,930 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:20,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 187 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:49:20,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38184 states. [2022-11-22 01:49:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38184 to 36897. [2022-11-22 01:49:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36897 states, 36896 states have (on average 1.2154976149176062) internal successors, (44847), 36896 states have internal predecessors, (44847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36897 states to 36897 states and 44847 transitions. [2022-11-22 01:49:21,466 INFO L78 Accepts]: Start accepts. Automaton has 36897 states and 44847 transitions. Word has length 249 [2022-11-22 01:49:21,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:21,467 INFO L495 AbstractCegarLoop]: Abstraction has 36897 states and 44847 transitions. [2022-11-22 01:49:21,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 36897 states and 44847 transitions. [2022-11-22 01:49:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-22 01:49:21,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:21,486 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-11-22 01:49:21,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 01:49:21,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 01:49:21,692 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:21,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1601074587, now seen corresponding path program 1 times [2022-11-22 01:49:21,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:21,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303247606] [2022-11-22 01:49:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:21,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-22 01:49:22,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:22,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303247606] [2022-11-22 01:49:22,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303247606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:49:22,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415450030] [2022-11-22 01:49:22,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:22,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:22,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:22,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:49:22,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:49:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:22,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:49:22,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-22 01:49:22,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:49:22,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415450030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:22,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:49:22,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:49:22,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029266008] [2022-11-22 01:49:22,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:22,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:22,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:22,825 INFO L87 Difference]: Start difference. First operand 36897 states and 44847 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:23,997 INFO L93 Difference]: Finished difference Result 82802 states and 101580 transitions. [2022-11-22 01:49:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 265 [2022-11-22 01:49:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:24,046 INFO L225 Difference]: With dead ends: 82802 [2022-11-22 01:49:24,046 INFO L226 Difference]: Without dead ends: 46907 [2022-11-22 01:49:24,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:24,068 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:24,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 76 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:49:24,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46907 states. [2022-11-22 01:49:24,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46907 to 44619. [2022-11-22 01:49:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44619 states, 44618 states have (on average 1.2081222824868887) internal successors, (53904), 44618 states have internal predecessors, (53904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44619 states to 44619 states and 53904 transitions. [2022-11-22 01:49:24,777 INFO L78 Accepts]: Start accepts. Automaton has 44619 states and 53904 transitions. Word has length 265 [2022-11-22 01:49:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:24,777 INFO L495 AbstractCegarLoop]: Abstraction has 44619 states and 53904 transitions. [2022-11-22 01:49:24,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 44619 states and 53904 transitions. [2022-11-22 01:49:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-22 01:49:24,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:24,800 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 01:49:24,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-22 01:49:25,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 01:49:25,001 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash -142547820, now seen corresponding path program 1 times [2022-11-22 01:49:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:25,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475208452] [2022-11-22 01:49:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:25,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-22 01:49:25,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:25,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475208452] [2022-11-22 01:49:25,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475208452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:25,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:25,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:49:25,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960234125] [2022-11-22 01:49:25,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:25,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:49:25,579 INFO L87 Difference]: Start difference. First operand 44619 states and 53904 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:26,756 INFO L93 Difference]: Finished difference Result 101964 states and 123098 transitions. [2022-11-22 01:49:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:26,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 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 322 [2022-11-22 01:49:26,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:26,992 INFO L225 Difference]: With dead ends: 101964 [2022-11-22 01:49:26,993 INFO L226 Difference]: Without dead ends: 59491 [2022-11-22 01:49:27,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:49:27,006 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:27,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 61 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:49:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59491 states. [2022-11-22 01:49:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59491 to 59491. [2022-11-22 01:49:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59491 states, 59490 states have (on average 1.2010758110606825) internal successors, (71452), 59490 states have internal predecessors, (71452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59491 states to 59491 states and 71452 transitions. [2022-11-22 01:49:27,828 INFO L78 Accepts]: Start accepts. Automaton has 59491 states and 71452 transitions. Word has length 322 [2022-11-22 01:49:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:27,828 INFO L495 AbstractCegarLoop]: Abstraction has 59491 states and 71452 transitions. [2022-11-22 01:49:27,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 59491 states and 71452 transitions. [2022-11-22 01:49:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-22 01:49:27,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:27,860 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 01:49:27,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-22 01:49:27,860 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:27,861 INFO L85 PathProgramCache]: Analyzing trace with hash 848149713, now seen corresponding path program 1 times [2022-11-22 01:49:27,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:27,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313810852] [2022-11-22 01:49:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:27,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 197 proven. 6 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-22 01:49:29,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313810852] [2022-11-22 01:49:29,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313810852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:49:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765121884] [2022-11-22 01:49:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:29,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:29,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:29,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:49:29,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:49:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:30,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:49:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:49:30,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:49:30,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765121884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:30,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:49:30,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-22 01:49:30,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761333462] [2022-11-22 01:49:30,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:30,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:30,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:30,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:30,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:49:30,278 INFO L87 Difference]: Start difference. First operand 59491 states and 71452 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:31,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:31,431 INFO L93 Difference]: Finished difference Result 116264 states and 139739 transitions. [2022-11-22 01:49:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:31,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 329 [2022-11-22 01:49:31,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:31,498 INFO L225 Difference]: With dead ends: 116264 [2022-11-22 01:49:31,498 INFO L226 Difference]: Without dead ends: 57775 [2022-11-22 01:49:31,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:49:31,525 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 128 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:31,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 228 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:49:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57775 states. [2022-11-22 01:49:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57775 to 56345. [2022-11-22 01:49:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56345 states, 56344 states have (on average 1.197589805480619) internal successors, (67477), 56344 states have internal predecessors, (67477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56345 states to 56345 states and 67477 transitions. [2022-11-22 01:49:32,585 INFO L78 Accepts]: Start accepts. Automaton has 56345 states and 67477 transitions. Word has length 329 [2022-11-22 01:49:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:32,585 INFO L495 AbstractCegarLoop]: Abstraction has 56345 states and 67477 transitions. [2022-11-22 01:49:32,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 56345 states and 67477 transitions. [2022-11-22 01:49:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-11-22 01:49:32,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:32,614 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 01:49:32,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:49:32,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:32,815 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:32,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:32,816 INFO L85 PathProgramCache]: Analyzing trace with hash 884758139, now seen corresponding path program 1 times [2022-11-22 01:49:32,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:32,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687962574] [2022-11-22 01:49:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:32,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 01:49:33,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687962574] [2022-11-22 01:49:33,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687962574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:33,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:33,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:49:33,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119444733] [2022-11-22 01:49:33,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:33,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:49:33,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:49:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:49:33,258 INFO L87 Difference]: Start difference. First operand 56345 states and 67477 transitions. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:34,641 INFO L93 Difference]: Finished difference Result 123271 states and 148568 transitions. [2022-11-22 01:49:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:49:34,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 346 [2022-11-22 01:49:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:34,712 INFO L225 Difference]: With dead ends: 123271 [2022-11-22 01:49:34,712 INFO L226 Difference]: Without dead ends: 68500 [2022-11-22 01:49:34,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:49:34,740 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 311 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:34,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 11 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:49:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68500 states. [2022-11-22 01:49:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68500 to 65640. [2022-11-22 01:49:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65640 states, 65639 states have (on average 1.1735553558098082) internal successors, (77031), 65639 states have internal predecessors, (77031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65640 states to 65640 states and 77031 transitions. [2022-11-22 01:49:36,323 INFO L78 Accepts]: Start accepts. Automaton has 65640 states and 77031 transitions. Word has length 346 [2022-11-22 01:49:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:36,324 INFO L495 AbstractCegarLoop]: Abstraction has 65640 states and 77031 transitions. [2022-11-22 01:49:36,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:49:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 65640 states and 77031 transitions. [2022-11-22 01:49:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-11-22 01:49:36,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:36,359 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 01:49:36,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-22 01:49:36,359 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2144683303, now seen corresponding path program 1 times [2022-11-22 01:49:36,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:36,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774176220] [2022-11-22 01:49:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:36,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 147 proven. 6 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-11-22 01:49:36,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:36,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774176220] [2022-11-22 01:49:36,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774176220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:49:36,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137215857] [2022-11-22 01:49:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:36,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:36,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:36,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:49:36,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c69f36ce-4875-4612-b797-c265050c0399/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:49:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:37,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:49:37,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 301 proven. 71 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-22 01:49:37,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:49:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 301 proven. 71 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-22 01:49:37,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137215857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:49:37,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1198262740] [2022-11-22 01:49:37,948 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-22 01:49:37,949 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:49:37,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:49:37,964 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:49:37,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs