./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7 --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 cdd691469d2e12c2dd1871c48be4dd2db0b9d27541ac5dee5ff25a04db0d98eb --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:21:53,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:21:53,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:21:53,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:21:53,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:21:53,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:21:53,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:21:53,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:21:53,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:21:53,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:21:53,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:21:53,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:21:53,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:21:53,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:21:53,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:21:53,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:21:53,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:21:53,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:21:53,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:21:53,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:21:53,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:21:53,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:21:53,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:21:53,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:21:53,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:21:53,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:21:53,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:21:53,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:21:53,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:21:53,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:21:53,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:21:53,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:21:53,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:21:53,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:21:53,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:21:53,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:21:53,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:21:53,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:21:53,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:21:53,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:21:53,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:21:53,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:21:53,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:21:53,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:21:53,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:21:53,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:21:53,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:21:53,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:21:53,730 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:21:53,730 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:21:53,730 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:21:53,730 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:21:53,730 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:21:53,731 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:21:53,731 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:21:53,731 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:21:53,731 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:21:53,731 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:21:53,732 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:21:53,732 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:21:53,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:21:53,733 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:21:53,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:21:53,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:21:53,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:21:53,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:21:53,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:21:53,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:21:53,734 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:21:53,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:21:53,734 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:21:53,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:21:53,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:21:53,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:21:53,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:53,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:21:53,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:21:53,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:21:53,736 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:21:53,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:21:53,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:21:53,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:21:53,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:21:53,737 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdd691469d2e12c2dd1871c48be4dd2db0b9d27541ac5dee5ff25a04db0d98eb [2021-11-25 20:21:54,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:21:54,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:21:54,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:21:54,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:21:54,043 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:21:54,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c [2021-11-25 20:21:54,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/data/1ada7f1be/078e26a381a54338a637278b25052e38/FLAG9e39abc97 [2021-11-25 20:21:54,600 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:21:54,603 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c [2021-11-25 20:21:54,627 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/data/1ada7f1be/078e26a381a54338a637278b25052e38/FLAG9e39abc97 [2021-11-25 20:21:54,962 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/data/1ada7f1be/078e26a381a54338a637278b25052e38 [2021-11-25 20:21:54,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:21:54,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:21:54,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:54,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:21:54,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:21:54,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:54" (1/1) ... [2021-11-25 20:21:54,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@460daac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:54, skipping insertion in model container [2021-11-25 20:21:54,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:54" (1/1) ... [2021-11-25 20:21:54,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:21:55,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:21:55,320 WARN L230 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_441935fb-99b2-4f46-a044-8a40f6e38b6d/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c[14702,14715] [2021-11-25 20:21:55,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:55,334 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:21:55,407 WARN L230 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_441935fb-99b2-4f46-a044-8a40f6e38b6d/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c[14702,14715] [2021-11-25 20:21:55,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:55,425 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:21:55,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55 WrapperNode [2021-11-25 20:21:55,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:55,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:55,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:21:55,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:21:55,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (1/1) ... [2021-11-25 20:21:55,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (1/1) ... [2021-11-25 20:21:55,516 INFO L137 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 538 [2021-11-25 20:21:55,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:55,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:21:55,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:21:55,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:21:55,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (1/1) ... [2021-11-25 20:21:55,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (1/1) ... [2021-11-25 20:21:55,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (1/1) ... [2021-11-25 20:21:55,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (1/1) ... [2021-11-25 20:21:55,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (1/1) ... [2021-11-25 20:21:55,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (1/1) ... [2021-11-25 20:21:55,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (1/1) ... [2021-11-25 20:21:55,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:21:55,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:21:55,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:21:55,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:21:55,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (1/1) ... [2021-11-25 20:21:55,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:55,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:21:55,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:21:55,713 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2021-11-25 20:21:55,714 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2021-11-25 20:21:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:21:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2021-11-25 20:21:55,714 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2021-11-25 20:21:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-11-25 20:21:55,714 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-11-25 20:21:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2021-11-25 20:21:55,714 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2021-11-25 20:21:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 20:21:55,714 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 20:21:55,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:21:55,715 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2021-11-25 20:21:55,715 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2021-11-25 20:21:55,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:21:55,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:21:55,715 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2021-11-25 20:21:55,715 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2021-11-25 20:21:55,840 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:21:55,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:21:56,452 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:21:56,766 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:21:56,766 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:21:56,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:56 BoogieIcfgContainer [2021-11-25 20:21:56,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:21:56,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:21:56,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:21:56,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:21:56,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:21:54" (1/3) ... [2021-11-25 20:21:56,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ba244d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:56, skipping insertion in model container [2021-11-25 20:21:56,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:55" (2/3) ... [2021-11-25 20:21:56,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ba244d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:56, skipping insertion in model container [2021-11-25 20:21:56,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:56" (3/3) ... [2021-11-25 20:21:56,783 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c [2021-11-25 20:21:56,796 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:21:56,797 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:21:56,878 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:21:56,890 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:21:56,890 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:21:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-25 20:21:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 20:21:56,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:56,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:56,943 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:56,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1166703025, now seen corresponding path program 1 times [2021-11-25 20:21:56,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:56,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99896404] [2021-11-25 20:21:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:56,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:57,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:57,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99896404] [2021-11-25 20:21:57,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99896404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:57,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:57,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:57,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491769964] [2021-11-25 20:21:57,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:57,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:57,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:57,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:57,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:57,495 INFO L87 Difference]: Start difference. First operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:21:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:57,634 INFO L93 Difference]: Finished difference Result 301 states and 489 transitions. [2021-11-25 20:21:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-25 20:21:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:57,647 INFO L225 Difference]: With dead ends: 301 [2021-11-25 20:21:57,647 INFO L226 Difference]: Without dead ends: 153 [2021-11-25 20:21:57,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:57,662 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 5 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:57,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 626 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-25 20:21:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-25 20:21:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 113 states have (on average 1.5044247787610618) internal successors, (170), 113 states have internal predecessors, (170), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-25 20:21:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2021-11-25 20:21:57,765 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 19 [2021-11-25 20:21:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:57,767 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2021-11-25 20:21:57,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:21:57,768 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2021-11-25 20:21:57,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 20:21:57,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:57,771 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:21:57,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:21:57,773 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1729445324, now seen corresponding path program 1 times [2021-11-25 20:21:57,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:57,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578668270] [2021-11-25 20:21:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:57,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:21:58,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:58,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578668270] [2021-11-25 20:21:58,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578668270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:58,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:58,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:21:58,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166444349] [2021-11-25 20:21:58,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:58,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:58,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:58,015 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:21:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:58,486 INFO L93 Difference]: Finished difference Result 435 states and 675 transitions. [2021-11-25 20:21:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:21:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2021-11-25 20:21:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:58,495 INFO L225 Difference]: With dead ends: 435 [2021-11-25 20:21:58,495 INFO L226 Difference]: Without dead ends: 285 [2021-11-25 20:21:58,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:21:58,504 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 569 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:58,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 596 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:21:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-25 20:21:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 187. [2021-11-25 20:21:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5070422535211268) internal successors, (214), 142 states have internal predecessors, (214), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-25 20:21:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 282 transitions. [2021-11-25 20:21:58,553 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 282 transitions. Word has length 30 [2021-11-25 20:21:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:58,554 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 282 transitions. [2021-11-25 20:21:58,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:21:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 282 transitions. [2021-11-25 20:21:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 20:21:58,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:58,557 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:21:58,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:21:58,557 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:58,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:58,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1540164151, now seen corresponding path program 1 times [2021-11-25 20:21:58,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:58,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857312504] [2021-11-25 20:21:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:58,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:21:58,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:58,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857312504] [2021-11-25 20:21:58,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857312504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:58,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:58,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:21:58,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678868575] [2021-11-25 20:21:58,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:58,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:58,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:58,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:58,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:58,713 INFO L87 Difference]: Start difference. First operand 187 states and 282 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:21:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:59,020 INFO L93 Difference]: Finished difference Result 435 states and 673 transitions. [2021-11-25 20:21:59,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:21:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2021-11-25 20:21:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:59,024 INFO L225 Difference]: With dead ends: 435 [2021-11-25 20:21:59,024 INFO L226 Difference]: Without dead ends: 285 [2021-11-25 20:21:59,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:21:59,035 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 565 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:59,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 599 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:21:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-25 20:21:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 187. [2021-11-25 20:21:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5) internal successors, (213), 142 states have internal predecessors, (213), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-25 20:21:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 281 transitions. [2021-11-25 20:21:59,076 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 281 transitions. Word has length 31 [2021-11-25 20:21:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:59,077 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 281 transitions. [2021-11-25 20:21:59,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:21:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 281 transitions. [2021-11-25 20:21:59,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 20:21:59,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:59,082 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:21:59,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:21:59,083 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1852556943, now seen corresponding path program 1 times [2021-11-25 20:21:59,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:59,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106573701] [2021-11-25 20:21:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:59,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:21:59,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:59,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106573701] [2021-11-25 20:21:59,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106573701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:59,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:59,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:59,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651972005] [2021-11-25 20:21:59,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:59,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:59,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:59,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:59,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:59,206 INFO L87 Difference]: Start difference. First operand 187 states and 281 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:21:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:59,273 INFO L93 Difference]: Finished difference Result 342 states and 516 transitions. [2021-11-25 20:21:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:59,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2021-11-25 20:21:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:59,276 INFO L225 Difference]: With dead ends: 342 [2021-11-25 20:21:59,276 INFO L226 Difference]: Without dead ends: 192 [2021-11-25 20:21:59,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:59,278 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:59,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 638 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:21:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-25 20:21:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-11-25 20:21:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 146 states have (on average 1.4863013698630136) internal successors, (217), 146 states have internal predecessors, (217), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-25 20:21:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 285 transitions. [2021-11-25 20:21:59,296 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 285 transitions. Word has length 33 [2021-11-25 20:21:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:59,296 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 285 transitions. [2021-11-25 20:21:59,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:21:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 285 transitions. [2021-11-25 20:21:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 20:21:59,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:59,298 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:21:59,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:21:59,299 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:59,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:59,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1321944341, now seen corresponding path program 1 times [2021-11-25 20:21:59,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:59,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9314210] [2021-11-25 20:21:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:59,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:21:59,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:59,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9314210] [2021-11-25 20:21:59,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9314210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:59,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:59,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:59,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209204432] [2021-11-25 20:21:59,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:59,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:59,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:59,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:59,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:59,405 INFO L87 Difference]: Start difference. First operand 192 states and 285 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:21:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:59,492 INFO L93 Difference]: Finished difference Result 352 states and 527 transitions. [2021-11-25 20:21:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:59,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2021-11-25 20:21:59,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:59,497 INFO L225 Difference]: With dead ends: 352 [2021-11-25 20:21:59,498 INFO L226 Difference]: Without dead ends: 197 [2021-11-25 20:21:59,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:59,500 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 6 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:59,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 624 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-25 20:21:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-25 20:21:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 150 states have (on average 1.4733333333333334) internal successors, (221), 150 states have internal predecessors, (221), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-25 20:21:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2021-11-25 20:21:59,527 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 41 [2021-11-25 20:21:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:59,530 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2021-11-25 20:21:59,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:21:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2021-11-25 20:21:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:21:59,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:59,536 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:21:59,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:21:59,536 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:59,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1907041343, now seen corresponding path program 1 times [2021-11-25 20:21:59,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:59,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640660771] [2021-11-25 20:21:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:59,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:21:59,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:59,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640660771] [2021-11-25 20:21:59,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640660771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:59,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:59,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:59,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635828900] [2021-11-25 20:21:59,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:59,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:59,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:59,673 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 20:21:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:59,754 INFO L93 Difference]: Finished difference Result 361 states and 531 transitions. [2021-11-25 20:21:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-25 20:21:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:59,760 INFO L225 Difference]: With dead ends: 361 [2021-11-25 20:21:59,761 INFO L226 Difference]: Without dead ends: 201 [2021-11-25 20:21:59,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:59,764 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 5 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:59,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 633 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-25 20:21:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-11-25 20:21:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 153 states have internal predecessors, (224), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-25 20:21:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2021-11-25 20:21:59,788 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 49 [2021-11-25 20:21:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:59,789 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2021-11-25 20:21:59,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 20:21:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2021-11-25 20:21:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:21:59,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:59,791 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:21:59,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:21:59,791 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:59,792 INFO L85 PathProgramCache]: Analyzing trace with hash 8533350, now seen corresponding path program 1 times [2021-11-25 20:21:59,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:59,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334539230] [2021-11-25 20:21:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:59,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:21:59,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:59,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334539230] [2021-11-25 20:21:59,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334539230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:59,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:59,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:59,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791887655] [2021-11-25 20:21:59,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:59,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:59,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:59,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:59,915 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 20:21:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:59,993 INFO L93 Difference]: Finished difference Result 370 states and 541 transitions. [2021-11-25 20:21:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-25 20:21:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:59,996 INFO L225 Difference]: With dead ends: 370 [2021-11-25 20:21:59,997 INFO L226 Difference]: Without dead ends: 206 [2021-11-25 20:21:59,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:59,999 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 6 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:59,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 624 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:22:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-25 20:22:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-25 20:22:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 157 states have (on average 1.4522292993630572) internal successors, (228), 157 states have internal predecessors, (228), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-25 20:22:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 296 transitions. [2021-11-25 20:22:00,021 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 296 transitions. Word has length 49 [2021-11-25 20:22:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:00,024 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 296 transitions. [2021-11-25 20:22:00,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 20:22:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 296 transitions. [2021-11-25 20:22:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 20:22:00,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:00,028 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:22:00,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:22:00,029 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:00,030 INFO L85 PathProgramCache]: Analyzing trace with hash -311743642, now seen corresponding path program 1 times [2021-11-25 20:22:00,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:00,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70757396] [2021-11-25 20:22:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:00,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:22:00,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:00,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70757396] [2021-11-25 20:22:00,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70757396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:00,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:00,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:22:00,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213585611] [2021-11-25 20:22:00,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:00,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:22:00,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:22:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:22:00,209 INFO L87 Difference]: Start difference. First operand 206 states and 296 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:22:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:00,298 INFO L93 Difference]: Finished difference Result 381 states and 548 transitions. [2021-11-25 20:22:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:22:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2021-11-25 20:22:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:00,304 INFO L225 Difference]: With dead ends: 381 [2021-11-25 20:22:00,305 INFO L226 Difference]: Without dead ends: 212 [2021-11-25 20:22:00,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:22:00,306 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 7 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:00,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 635 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-25 20:22:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-25 20:22:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 162 states have (on average 1.4382716049382716) internal successors, (233), 162 states have internal predecessors, (233), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-25 20:22:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 301 transitions. [2021-11-25 20:22:00,325 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 301 transitions. Word has length 57 [2021-11-25 20:22:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:00,326 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 301 transitions. [2021-11-25 20:22:00,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:22:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 301 transitions. [2021-11-25 20:22:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 20:22:00,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:00,328 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:22:00,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:22:00,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash -71883967, now seen corresponding path program 1 times [2021-11-25 20:22:00,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:00,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079273052] [2021-11-25 20:22:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:00,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:22:00,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:00,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079273052] [2021-11-25 20:22:00,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079273052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:00,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590615713] [2021-11-25 20:22:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:00,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:00,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:00,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:00,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:22:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:00,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:22:00,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:22:01,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:22:01,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590615713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:01,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:22:01,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2021-11-25 20:22:01,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584574787] [2021-11-25 20:22:01,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:01,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:22:01,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:22:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:22:01,198 INFO L87 Difference]: Start difference. First operand 212 states and 301 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 20:22:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:01,479 INFO L93 Difference]: Finished difference Result 601 states and 839 transitions. [2021-11-25 20:22:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:22:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2021-11-25 20:22:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:01,483 INFO L225 Difference]: With dead ends: 601 [2021-11-25 20:22:01,484 INFO L226 Difference]: Without dead ends: 400 [2021-11-25 20:22:01,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:22:01,487 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 233 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:01,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1099 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:22:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-25 20:22:01,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 396. [2021-11-25 20:22:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 300 states have (on average 1.42) internal successors, (426), 301 states have internal predecessors, (426), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-25 20:22:01,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 556 transitions. [2021-11-25 20:22:01,546 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 556 transitions. Word has length 60 [2021-11-25 20:22:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:01,547 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 556 transitions. [2021-11-25 20:22:01,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 20:22:01,547 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 556 transitions. [2021-11-25 20:22:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 20:22:01,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:01,549 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:22:01,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:22:01,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 20:22:01,763 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:01,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:01,763 INFO L85 PathProgramCache]: Analyzing trace with hash -399936524, now seen corresponding path program 1 times [2021-11-25 20:22:01,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:01,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977465227] [2021-11-25 20:22:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:01,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:22:01,999 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:01,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977465227] [2021-11-25 20:22:01,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977465227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:01,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186576358] [2021-11-25 20:22:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:02,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:02,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:02,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:02,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:22:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:02,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:22:02,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:02,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:22:02,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186576358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:22:02,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [34396603] [2021-11-25 20:22:03,020 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2021-11-25 20:22:03,021 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:22:03,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:22:03,032 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:22:03,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:22:06,995 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 111 for LOIs [2021-11-25 20:22:07,134 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2021-11-25 20:22:07,153 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 104 for LOIs [2021-11-25 20:22:07,222 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:22:20,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [34396603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:20,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:22:20,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2021-11-25 20:22:20,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964664779] [2021-11-25 20:22:20,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:20,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 20:22:20,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 20:22:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 20:22:20,873 INFO L87 Difference]: Start difference. First operand 396 states and 556 transitions. Second operand has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 20:22:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:26,573 INFO L93 Difference]: Finished difference Result 821 states and 1160 transitions. [2021-11-25 20:22:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 20:22:26,574 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 62 [2021-11-25 20:22:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:26,577 INFO L225 Difference]: With dead ends: 821 [2021-11-25 20:22:26,577 INFO L226 Difference]: Without dead ends: 465 [2021-11-25 20:22:26,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 154 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 20:22:26,579 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 196 mSDsluCounter, 2357 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 2625 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:26,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 2625 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 20:22:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-25 20:22:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 442. [2021-11-25 20:22:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 331 states have (on average 1.3987915407854985) internal successors, (463), 332 states have internal predecessors, (463), 78 states have call successors, (78), 32 states have call predecessors, (78), 32 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-25 20:22:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 619 transitions. [2021-11-25 20:22:26,629 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 619 transitions. Word has length 62 [2021-11-25 20:22:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:26,630 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 619 transitions. [2021-11-25 20:22:26,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 20:22:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 619 transitions. [2021-11-25 20:22:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 20:22:26,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:26,632 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:22:26,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:22:26,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:22:26,839 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:26,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1021702805, now seen corresponding path program 1 times [2021-11-25 20:22:26,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:26,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700312140] [2021-11-25 20:22:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:26,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:22:27,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:27,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700312140] [2021-11-25 20:22:27,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700312140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:27,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487296793] [2021-11-25 20:22:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:27,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:27,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:27,091 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:27,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:22:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:27,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:22:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:27,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:22:27,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487296793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:22:27,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901446287] [2021-11-25 20:22:27,837 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2021-11-25 20:22:27,838 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:22:27,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:22:27,838 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:22:27,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:22:45,990 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 174 for LOIs [2021-11-25 20:22:47,711 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2021-11-25 20:22:47,713 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 21 for LOIs [2021-11-25 20:22:47,722 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 30 for LOIs [2021-11-25 20:22:47,732 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 26 for LOIs [2021-11-25 20:22:47,743 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 15 for LOIs [2021-11-25 20:22:47,752 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:23:01,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10143#(and (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (<= ~active_side_History_1~0 127) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~active_side_History_0~0 2) (not (= 2 ~active_side_History_0~0)) (not (= ~manual_selection_History_1~0 0)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ ~active_side_History_1~0 128)))' at error location [2021-11-25 20:23:01,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:23:01,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:23:01,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2021-11-25 20:23:01,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470677106] [2021-11-25 20:23:01,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:23:01,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:23:01,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:23:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2829, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 20:23:01,480 INFO L87 Difference]: Start difference. First operand 442 states and 619 transitions. Second operand has 13 states, 9 states have (on average 7.444444444444445) internal successors, (67), 12 states have internal predecessors, (67), 4 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:23:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:02,174 INFO L93 Difference]: Finished difference Result 1158 states and 1633 transitions. [2021-11-25 20:23:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:23:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.444444444444445) internal successors, (67), 12 states have internal predecessors, (67), 4 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 62 [2021-11-25 20:23:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:02,181 INFO L225 Difference]: With dead ends: 1158 [2021-11-25 20:23:02,181 INFO L226 Difference]: Without dead ends: 799 [2021-11-25 20:23:02,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 20:23:02,185 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 272 mSDsluCounter, 3011 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:02,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 3133 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:23:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-11-25 20:23:02,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 497. [2021-11-25 20:23:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 370 states have (on average 1.3702702702702703) internal successors, (507), 373 states have internal predecessors, (507), 84 states have call successors, (84), 42 states have call predecessors, (84), 42 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-25 20:23:02,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 675 transitions. [2021-11-25 20:23:02,254 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 675 transitions. Word has length 62 [2021-11-25 20:23:02,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:02,254 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 675 transitions. [2021-11-25 20:23:02,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.444444444444445) internal successors, (67), 12 states have internal predecessors, (67), 4 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:23:02,255 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 675 transitions. [2021-11-25 20:23:02,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 20:23:02,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:02,256 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:02,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:02,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:02,471 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1308659894, now seen corresponding path program 1 times [2021-11-25 20:23:02,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:02,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161349448] [2021-11-25 20:23:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:02,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:23:02,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161349448] [2021-11-25 20:23:02,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161349448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:02,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:02,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:23:02,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863115455] [2021-11-25 20:23:02,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:02,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:23:02,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:02,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:23:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:23:02,546 INFO L87 Difference]: Start difference. First operand 497 states and 675 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 20:23:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:02,637 INFO L93 Difference]: Finished difference Result 907 states and 1237 transitions. [2021-11-25 20:23:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:23:02,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2021-11-25 20:23:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:02,642 INFO L225 Difference]: With dead ends: 907 [2021-11-25 20:23:02,642 INFO L226 Difference]: Without dead ends: 509 [2021-11-25 20:23:02,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:02,644 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 5 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:02,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 633 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:23:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-25 20:23:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2021-11-25 20:23:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 379 states have (on average 1.3614775725593669) internal successors, (516), 382 states have internal predecessors, (516), 84 states have call successors, (84), 45 states have call predecessors, (84), 45 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-25 20:23:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 684 transitions. [2021-11-25 20:23:02,702 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 684 transitions. Word has length 66 [2021-11-25 20:23:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:02,703 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 684 transitions. [2021-11-25 20:23:02,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 20:23:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 684 transitions. [2021-11-25 20:23:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 20:23:02,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:02,707 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:02,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:23:02,707 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:02,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash -17388373, now seen corresponding path program 1 times [2021-11-25 20:23:02,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:02,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948335665] [2021-11-25 20:23:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:02,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:23:02,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948335665] [2021-11-25 20:23:02,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948335665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:02,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:02,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:23:02,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190181280] [2021-11-25 20:23:02,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:02,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:23:02,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:02,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:23:02,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:23:02,793 INFO L87 Difference]: Start difference. First operand 509 states and 684 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 20:23:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:02,973 INFO L93 Difference]: Finished difference Result 642 states and 895 transitions. [2021-11-25 20:23:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:23:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 65 [2021-11-25 20:23:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:02,979 INFO L225 Difference]: With dead ends: 642 [2021-11-25 20:23:02,979 INFO L226 Difference]: Without dead ends: 640 [2021-11-25 20:23:02,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:23:02,981 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 173 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:02,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1706 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-11-25 20:23:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 513. [2021-11-25 20:23:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 381 states have (on average 1.3595800524934383) internal successors, (518), 385 states have internal predecessors, (518), 85 states have call successors, (85), 46 states have call predecessors, (85), 46 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-11-25 20:23:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 688 transitions. [2021-11-25 20:23:03,036 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 688 transitions. Word has length 65 [2021-11-25 20:23:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:03,037 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 688 transitions. [2021-11-25 20:23:03,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 20:23:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 688 transitions. [2021-11-25 20:23:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 20:23:03,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:03,039 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:03,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:23:03,039 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:03,040 INFO L85 PathProgramCache]: Analyzing trace with hash 262723461, now seen corresponding path program 1 times [2021-11-25 20:23:03,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:03,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601230747] [2021-11-25 20:23:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:03,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:23:03,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:03,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601230747] [2021-11-25 20:23:03,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601230747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:03,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:03,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:23:03,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379112888] [2021-11-25 20:23:03,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:03,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:23:03,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:03,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:23:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:23:03,109 INFO L87 Difference]: Start difference. First operand 513 states and 688 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 20:23:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:03,210 INFO L93 Difference]: Finished difference Result 833 states and 1120 transitions. [2021-11-25 20:23:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:23:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2021-11-25 20:23:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:03,214 INFO L225 Difference]: With dead ends: 833 [2021-11-25 20:23:03,214 INFO L226 Difference]: Without dead ends: 507 [2021-11-25 20:23:03,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:03,216 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 7 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:03,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 625 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:23:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-25 20:23:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2021-11-25 20:23:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 378 states have (on average 1.3386243386243386) internal successors, (506), 382 states have internal predecessors, (506), 82 states have call successors, (82), 46 states have call predecessors, (82), 46 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-25 20:23:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 670 transitions. [2021-11-25 20:23:03,273 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 670 transitions. Word has length 68 [2021-11-25 20:23:03,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:03,273 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 670 transitions. [2021-11-25 20:23:03,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 20:23:03,273 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 670 transitions. [2021-11-25 20:23:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:23:03,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:03,276 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:03,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:23:03,276 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1200443003, now seen corresponding path program 1 times [2021-11-25 20:23:03,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:03,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133102261] [2021-11-25 20:23:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:03,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:23:03,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:03,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133102261] [2021-11-25 20:23:03,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133102261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:03,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733106406] [2021-11-25 20:23:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:03,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:03,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:03,627 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:03,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:23:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:03,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:23:03,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:23:04,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:23:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:23:04,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733106406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:23:04,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [47181039] [2021-11-25 20:23:04,394 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2021-11-25 20:23:04,394 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:04,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:04,395 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:04,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:23:20,799 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 174 for LOIs [2021-11-25 20:23:22,186 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 16 for LOIs [2021-11-25 20:23:22,192 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 30 for LOIs [2021-11-25 20:23:22,205 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 31 for LOIs [2021-11-25 20:23:22,213 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 25 for LOIs [2021-11-25 20:23:22,222 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 15 for LOIs [2021-11-25 20:23:22,228 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:23:36,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17954#(and (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (<= ~active_side_History_1~0 127) (not (= ~active_side_History_0~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= ~active_side_History_0~0 2) (not (= (mod ~side2Failed_History_1~0 256) 0)) (not (= ~manual_selection_History_1~0 0)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ ~active_side_History_1~0 128)) (= (mod ~side1Failed_History_1~0 256) 0))' at error location [2021-11-25 20:23:36,063 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:23:36,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:23:36,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2021-11-25 20:23:36,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074055401] [2021-11-25 20:23:36,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:23:36,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 20:23:36,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:36,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 20:23:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3859, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 20:23:36,067 INFO L87 Difference]: Start difference. First operand 507 states and 670 transitions. Second operand has 20 states, 15 states have (on average 6.0) internal successors, (90), 18 states have internal predecessors, (90), 6 states have call successors, (22), 3 states have call predecessors, (22), 9 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-25 20:23:37,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:37,304 INFO L93 Difference]: Finished difference Result 1131 states and 1557 transitions. [2021-11-25 20:23:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:23:37,305 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 6.0) internal successors, (90), 18 states have internal predecessors, (90), 6 states have call successors, (22), 3 states have call predecessors, (22), 9 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 70 [2021-11-25 20:23:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:37,310 INFO L225 Difference]: With dead ends: 1131 [2021-11-25 20:23:37,311 INFO L226 Difference]: Without dead ends: 761 [2021-11-25 20:23:37,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 148 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=352, Invalid=4760, Unknown=0, NotChecked=0, Total=5112 [2021-11-25 20:23:37,314 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 596 mSDsluCounter, 4338 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 4486 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:37,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 4486 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:23:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-11-25 20:23:37,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 514. [2021-11-25 20:23:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 384 states have (on average 1.3333333333333333) internal successors, (512), 389 states have internal predecessors, (512), 80 states have call successors, (80), 49 states have call predecessors, (80), 49 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2021-11-25 20:23:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 672 transitions. [2021-11-25 20:23:37,376 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 672 transitions. Word has length 70 [2021-11-25 20:23:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:37,376 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 672 transitions. [2021-11-25 20:23:37,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 6.0) internal successors, (90), 18 states have internal predecessors, (90), 6 states have call successors, (22), 3 states have call predecessors, (22), 9 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-25 20:23:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 672 transitions. [2021-11-25 20:23:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:23:37,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:37,378 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:37,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 20:23:37,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 20:23:37,587 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:37,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:37,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1025192534, now seen corresponding path program 1 times [2021-11-25 20:23:37,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:37,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362236907] [2021-11-25 20:23:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:37,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:23:37,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:37,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362236907] [2021-11-25 20:23:37,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362236907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:37,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:37,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:23:37,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005630348] [2021-11-25 20:23:37,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:37,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:23:37,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:23:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:23:37,699 INFO L87 Difference]: Start difference. First operand 514 states and 672 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:23:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:38,439 INFO L93 Difference]: Finished difference Result 1220 states and 1673 transitions. [2021-11-25 20:23:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:23:38,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 71 [2021-11-25 20:23:38,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:38,446 INFO L225 Difference]: With dead ends: 1220 [2021-11-25 20:23:38,447 INFO L226 Difference]: Without dead ends: 909 [2021-11-25 20:23:38,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:23:38,448 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 601 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:38,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 1992 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:23:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-11-25 20:23:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 641. [2021-11-25 20:23:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 476 states have (on average 1.3277310924369747) internal successors, (632), 481 states have internal predecessors, (632), 103 states have call successors, (103), 61 states have call predecessors, (103), 61 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-25 20:23:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 838 transitions. [2021-11-25 20:23:38,530 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 838 transitions. Word has length 71 [2021-11-25 20:23:38,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:38,531 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 838 transitions. [2021-11-25 20:23:38,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:23:38,531 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 838 transitions. [2021-11-25 20:23:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:23:38,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:38,533 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:38,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:23:38,534 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:38,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash -913951703, now seen corresponding path program 1 times [2021-11-25 20:23:38,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:38,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290576681] [2021-11-25 20:23:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:38,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:23:38,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:38,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290576681] [2021-11-25 20:23:38,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290576681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:38,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:38,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:23:38,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277535353] [2021-11-25 20:23:38,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:38,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:23:38,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:23:38,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:23:38,595 INFO L87 Difference]: Start difference. First operand 641 states and 838 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:38,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:38,854 INFO L93 Difference]: Finished difference Result 1605 states and 2140 transitions. [2021-11-25 20:23:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:23:38,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2021-11-25 20:23:38,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:38,862 INFO L225 Difference]: With dead ends: 1605 [2021-11-25 20:23:38,863 INFO L226 Difference]: Without dead ends: 1162 [2021-11-25 20:23:38,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:38,866 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 342 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:38,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 813 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-11-25 20:23:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1041. [2021-11-25 20:23:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 772 states have (on average 1.3186528497409327) internal successors, (1018), 781 states have internal predecessors, (1018), 168 states have call successors, (168), 100 states have call predecessors, (168), 100 states have return successors, (168), 159 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-25 20:23:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1354 transitions. [2021-11-25 20:23:38,982 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1354 transitions. Word has length 71 [2021-11-25 20:23:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:38,983 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1354 transitions. [2021-11-25 20:23:38,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1354 transitions. [2021-11-25 20:23:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:23:38,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:38,985 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:38,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:23:38,985 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:38,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:38,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1420846434, now seen corresponding path program 1 times [2021-11-25 20:23:38,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:38,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638096911] [2021-11-25 20:23:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:38,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:23:39,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:39,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638096911] [2021-11-25 20:23:39,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638096911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:39,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:39,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:23:39,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757567138] [2021-11-25 20:23:39,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:39,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:23:39,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:23:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:23:39,115 INFO L87 Difference]: Start difference. First operand 1041 states and 1354 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 20:23:40,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:40,025 INFO L93 Difference]: Finished difference Result 2948 states and 3996 transitions. [2021-11-25 20:23:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:23:40,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2021-11-25 20:23:40,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:40,039 INFO L225 Difference]: With dead ends: 2948 [2021-11-25 20:23:40,039 INFO L226 Difference]: Without dead ends: 2161 [2021-11-25 20:23:40,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:23:40,043 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 776 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:40,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 1842 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:23:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-11-25 20:23:40,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1456. [2021-11-25 20:23:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1071 states have (on average 1.3090569561157797) internal successors, (1402), 1083 states have internal predecessors, (1402), 244 states have call successors, (244), 140 states have call predecessors, (244), 140 states have return successors, (244), 232 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-25 20:23:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 1890 transitions. [2021-11-25 20:23:40,230 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 1890 transitions. Word has length 73 [2021-11-25 20:23:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:40,231 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 1890 transitions. [2021-11-25 20:23:40,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 20:23:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 1890 transitions. [2021-11-25 20:23:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:23:40,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:40,233 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:40,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:23:40,233 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash -741502709, now seen corresponding path program 1 times [2021-11-25 20:23:40,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:40,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372593360] [2021-11-25 20:23:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:40,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:23:40,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:40,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372593360] [2021-11-25 20:23:40,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372593360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:40,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:40,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:23:40,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160739484] [2021-11-25 20:23:40,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:40,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:23:40,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:23:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:23:40,291 INFO L87 Difference]: Start difference. First operand 1456 states and 1890 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:40,676 INFO L93 Difference]: Finished difference Result 3516 states and 4628 transitions. [2021-11-25 20:23:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:23:40,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2021-11-25 20:23:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:40,693 INFO L225 Difference]: With dead ends: 3516 [2021-11-25 20:23:40,693 INFO L226 Difference]: Without dead ends: 2450 [2021-11-25 20:23:40,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:40,697 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 367 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:40,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 877 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-11-25 20:23:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2160. [2021-11-25 20:23:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 1585 states have (on average 1.3003154574132492) internal successors, (2061), 1602 states have internal predecessors, (2061), 367 states have call successors, (367), 207 states have call predecessors, (367), 207 states have return successors, (367), 350 states have call predecessors, (367), 367 states have call successors, (367) [2021-11-25 20:23:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 2795 transitions. [2021-11-25 20:23:40,974 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 2795 transitions. Word has length 75 [2021-11-25 20:23:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:40,974 INFO L470 AbstractCegarLoop]: Abstraction has 2160 states and 2795 transitions. [2021-11-25 20:23:40,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 2795 transitions. [2021-11-25 20:23:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:23:40,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:40,980 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:40,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:23:40,980 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash -795481455, now seen corresponding path program 1 times [2021-11-25 20:23:40,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:40,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640994639] [2021-11-25 20:23:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:40,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:23:41,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:41,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640994639] [2021-11-25 20:23:41,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640994639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:41,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:41,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:23:41,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986391680] [2021-11-25 20:23:41,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:41,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:23:41,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:23:41,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:23:41,041 INFO L87 Difference]: Start difference. First operand 2160 states and 2795 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:41,501 INFO L93 Difference]: Finished difference Result 4758 states and 6223 transitions. [2021-11-25 20:23:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:23:41,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2021-11-25 20:23:41,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:41,523 INFO L225 Difference]: With dead ends: 4758 [2021-11-25 20:23:41,523 INFO L226 Difference]: Without dead ends: 3159 [2021-11-25 20:23:41,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:41,531 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 343 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:41,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 946 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2021-11-25 20:23:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 2900. [2021-11-25 20:23:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2126 states have (on average 1.295390404515522) internal successors, (2754), 2149 states have internal predecessors, (2754), 496 states have call successors, (496), 277 states have call predecessors, (496), 277 states have return successors, (496), 473 states have call predecessors, (496), 496 states have call successors, (496) [2021-11-25 20:23:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 3746 transitions. [2021-11-25 20:23:41,868 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 3746 transitions. Word has length 75 [2021-11-25 20:23:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:41,869 INFO L470 AbstractCegarLoop]: Abstraction has 2900 states and 3746 transitions. [2021-11-25 20:23:41,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:41,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 3746 transitions. [2021-11-25 20:23:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:23:41,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:41,875 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 20:23:41,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 20:23:41,875 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1909996017, now seen corresponding path program 1 times [2021-11-25 20:23:41,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:41,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321399187] [2021-11-25 20:23:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:41,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:23:41,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:41,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321399187] [2021-11-25 20:23:41,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321399187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:41,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:41,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:23:41,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224284892] [2021-11-25 20:23:41,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:41,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:23:41,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:23:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:23:41,944 INFO L87 Difference]: Start difference. First operand 2900 states and 3746 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-25 20:23:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:42,238 INFO L93 Difference]: Finished difference Result 5083 states and 6611 transitions. [2021-11-25 20:23:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:23:42,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 77 [2021-11-25 20:23:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:42,258 INFO L225 Difference]: With dead ends: 5083 [2021-11-25 20:23:42,259 INFO L226 Difference]: Without dead ends: 2860 [2021-11-25 20:23:42,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:42,265 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 7 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:42,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 607 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:23:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-11-25 20:23:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2860. [2021-11-25 20:23:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2106 states have (on average 1.2697056030389364) internal successors, (2674), 2129 states have internal predecessors, (2674), 476 states have call successors, (476), 277 states have call predecessors, (476), 277 states have return successors, (476), 453 states have call predecessors, (476), 476 states have call successors, (476) [2021-11-25 20:23:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 3626 transitions. [2021-11-25 20:23:42,614 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 3626 transitions. Word has length 77 [2021-11-25 20:23:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:42,614 INFO L470 AbstractCegarLoop]: Abstraction has 2860 states and 3626 transitions. [2021-11-25 20:23:42,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-25 20:23:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 3626 transitions. [2021-11-25 20:23:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:23:42,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:42,618 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:42,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 20:23:42,618 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:42,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1881309797, now seen corresponding path program 1 times [2021-11-25 20:23:42,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:42,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704463820] [2021-11-25 20:23:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:42,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:23:42,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:42,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704463820] [2021-11-25 20:23:42,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704463820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:42,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:42,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:23:42,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65827862] [2021-11-25 20:23:42,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:42,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:23:42,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:42,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:23:42,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:23:42,656 INFO L87 Difference]: Start difference. First operand 2860 states and 3626 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:43,106 INFO L93 Difference]: Finished difference Result 6155 states and 8129 transitions. [2021-11-25 20:23:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:23:43,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 76 [2021-11-25 20:23:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:43,135 INFO L225 Difference]: With dead ends: 6155 [2021-11-25 20:23:43,135 INFO L226 Difference]: Without dead ends: 3792 [2021-11-25 20:23:43,142 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:23:43,144 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 112 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:43,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 532 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-11-25 20:23:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2865. [2021-11-25 20:23:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2111 states have (on average 1.2690667929891046) internal successors, (2679), 2134 states have internal predecessors, (2679), 476 states have call successors, (476), 277 states have call predecessors, (476), 277 states have return successors, (476), 453 states have call predecessors, (476), 476 states have call successors, (476) [2021-11-25 20:23:43,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3631 transitions. [2021-11-25 20:23:43,519 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3631 transitions. Word has length 76 [2021-11-25 20:23:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:43,519 INFO L470 AbstractCegarLoop]: Abstraction has 2865 states and 3631 transitions. [2021-11-25 20:23:43,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3631 transitions. [2021-11-25 20:23:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:23:43,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:43,523 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:43,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 20:23:43,523 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:43,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2142032884, now seen corresponding path program 1 times [2021-11-25 20:23:43,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:43,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676639395] [2021-11-25 20:23:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:43,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:23:43,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:43,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676639395] [2021-11-25 20:23:43,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676639395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:43,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:43,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:23:43,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391189127] [2021-11-25 20:23:43,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:43,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:23:43,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:23:43,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:23:43,580 INFO L87 Difference]: Start difference. First operand 2865 states and 3631 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:43,933 INFO L93 Difference]: Finished difference Result 5334 states and 6862 transitions. [2021-11-25 20:23:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:23:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2021-11-25 20:23:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:43,971 INFO L225 Difference]: With dead ends: 5334 [2021-11-25 20:23:43,973 INFO L226 Difference]: Without dead ends: 2598 [2021-11-25 20:23:43,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:43,981 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 213 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:43,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 647 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-11-25 20:23:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2340. [2021-11-25 20:23:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 1723 states have (on average 1.273360417875798) internal successors, (2194), 1742 states have internal predecessors, (2194), 389 states have call successors, (389), 227 states have call predecessors, (389), 227 states have return successors, (389), 370 states have call predecessors, (389), 389 states have call successors, (389) [2021-11-25 20:23:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 2972 transitions. [2021-11-25 20:23:44,274 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 2972 transitions. Word has length 77 [2021-11-25 20:23:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:44,274 INFO L470 AbstractCegarLoop]: Abstraction has 2340 states and 2972 transitions. [2021-11-25 20:23:44,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 2972 transitions. [2021-11-25 20:23:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 20:23:44,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:44,278 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:44,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 20:23:44,278 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1532157264, now seen corresponding path program 1 times [2021-11-25 20:23:44,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:44,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459077995] [2021-11-25 20:23:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:44,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:23:44,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:44,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459077995] [2021-11-25 20:23:44,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459077995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:44,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:44,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:23:44,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516678787] [2021-11-25 20:23:44,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:44,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:23:44,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:44,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:23:44,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:23:44,332 INFO L87 Difference]: Start difference. First operand 2340 states and 2972 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:44,765 INFO L93 Difference]: Finished difference Result 4922 states and 6461 transitions. [2021-11-25 20:23:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:23:44,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2021-11-25 20:23:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:44,802 INFO L225 Difference]: With dead ends: 4922 [2021-11-25 20:23:44,808 INFO L226 Difference]: Without dead ends: 2894 [2021-11-25 20:23:44,814 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:23:44,815 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 112 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:44,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 509 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2021-11-25 20:23:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2345. [2021-11-25 20:23:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 1728 states have (on average 1.2725694444444444) internal successors, (2199), 1747 states have internal predecessors, (2199), 389 states have call successors, (389), 227 states have call predecessors, (389), 227 states have return successors, (389), 370 states have call predecessors, (389), 389 states have call successors, (389) [2021-11-25 20:23:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 2977 transitions. [2021-11-25 20:23:45,120 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 2977 transitions. Word has length 78 [2021-11-25 20:23:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:45,120 INFO L470 AbstractCegarLoop]: Abstraction has 2345 states and 2977 transitions. [2021-11-25 20:23:45,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 2977 transitions. [2021-11-25 20:23:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 20:23:45,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:45,123 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:23:45,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 20:23:45,123 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:45,124 INFO L85 PathProgramCache]: Analyzing trace with hash -876335019, now seen corresponding path program 1 times [2021-11-25 20:23:45,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:45,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109587643] [2021-11-25 20:23:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:45,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:23:45,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109587643] [2021-11-25 20:23:45,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109587643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:45,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:45,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:23:45,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908293814] [2021-11-25 20:23:45,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:45,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:23:45,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:45,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:23:45,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:23:45,206 INFO L87 Difference]: Start difference. First operand 2345 states and 2977 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:45,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:45,550 INFO L93 Difference]: Finished difference Result 4679 states and 6084 transitions. [2021-11-25 20:23:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:23:45,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2021-11-25 20:23:45,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:45,562 INFO L225 Difference]: With dead ends: 4679 [2021-11-25 20:23:45,562 INFO L226 Difference]: Without dead ends: 2594 [2021-11-25 20:23:45,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:45,571 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 170 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:45,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 645 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2021-11-25 20:23:45,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2157. [2021-11-25 20:23:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 1584 states have (on average 1.2683080808080809) internal successors, (2009), 1599 states have internal predecessors, (2009), 361 states have call successors, (361), 211 states have call predecessors, (361), 211 states have return successors, (361), 346 states have call predecessors, (361), 361 states have call successors, (361) [2021-11-25 20:23:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 2731 transitions. [2021-11-25 20:23:45,834 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 2731 transitions. Word has length 78 [2021-11-25 20:23:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:45,835 INFO L470 AbstractCegarLoop]: Abstraction has 2157 states and 2731 transitions. [2021-11-25 20:23:45,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:23:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 2731 transitions. [2021-11-25 20:23:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 20:23:45,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:45,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-25 20:23:45,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 20:23:45,839 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1405948241, now seen corresponding path program 1 times [2021-11-25 20:23:45,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:45,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156830691] [2021-11-25 20:23:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:45,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 20:23:45,911 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:45,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156830691] [2021-11-25 20:23:45,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156830691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:45,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:45,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:23:45,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056472490] [2021-11-25 20:23:45,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:45,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:23:45,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:23:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:23:45,914 INFO L87 Difference]: Start difference. First operand 2157 states and 2731 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-25 20:23:46,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:46,175 INFO L93 Difference]: Finished difference Result 4000 states and 5098 transitions. [2021-11-25 20:23:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:23:46,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 93 [2021-11-25 20:23:46,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:46,183 INFO L225 Difference]: With dead ends: 4000 [2021-11-25 20:23:46,183 INFO L226 Difference]: Without dead ends: 2127 [2021-11-25 20:23:46,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:46,189 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 7 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:46,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 595 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:23:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-25 20:23:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2052. [2021-11-25 20:23:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 1515 states have (on average 1.2389438943894389) internal successors, (1877), 1530 states have internal predecessors, (1877), 334 states have call successors, (334), 202 states have call predecessors, (334), 202 states have return successors, (334), 319 states have call predecessors, (334), 334 states have call successors, (334) [2021-11-25 20:23:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 2545 transitions. [2021-11-25 20:23:46,435 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 2545 transitions. Word has length 93 [2021-11-25 20:23:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:46,435 INFO L470 AbstractCegarLoop]: Abstraction has 2052 states and 2545 transitions. [2021-11-25 20:23:46,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-25 20:23:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 2545 transitions. [2021-11-25 20:23:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-25 20:23:46,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:46,440 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2021-11-25 20:23:46,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 20:23:46,440 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash 603476333, now seen corresponding path program 1 times [2021-11-25 20:23:46,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954490123] [2021-11-25 20:23:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:46,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 20:23:46,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:46,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954490123] [2021-11-25 20:23:46,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954490123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:46,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:46,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:23:46,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980126578] [2021-11-25 20:23:46,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:46,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:23:46,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:46,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:23:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:23:46,547 INFO L87 Difference]: Start difference. First operand 2052 states and 2545 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 20:23:46,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:46,786 INFO L93 Difference]: Finished difference Result 3757 states and 4693 transitions. [2021-11-25 20:23:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:23:46,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2021-11-25 20:23:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:46,795 INFO L225 Difference]: With dead ends: 3757 [2021-11-25 20:23:46,796 INFO L226 Difference]: Without dead ends: 2016 [2021-11-25 20:23:46,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:46,801 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:46,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 586 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:23:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-11-25 20:23:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1922. [2021-11-25 20:23:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1419 states have (on average 1.2135306553911205) internal successors, (1722), 1434 states have internal predecessors, (1722), 311 states have call successors, (311), 191 states have call predecessors, (311), 191 states have return successors, (311), 296 states have call predecessors, (311), 311 states have call successors, (311) [2021-11-25 20:23:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 2344 transitions. [2021-11-25 20:23:47,024 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 2344 transitions. Word has length 109 [2021-11-25 20:23:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:47,024 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 2344 transitions. [2021-11-25 20:23:47,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 20:23:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 2344 transitions. [2021-11-25 20:23:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-25 20:23:47,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:47,029 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2021-11-25 20:23:47,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 20:23:47,030 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:47,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:47,030 INFO L85 PathProgramCache]: Analyzing trace with hash 507710890, now seen corresponding path program 1 times [2021-11-25 20:23:47,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:47,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002814192] [2021-11-25 20:23:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:47,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-25 20:23:47,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:47,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002814192] [2021-11-25 20:23:47,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002814192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:47,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428267064] [2021-11-25 20:23:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:47,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:47,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:47,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:47,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:23:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:47,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 20:23:47,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:23:47,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:23:47,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428267064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:47,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:23:47,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 11 [2021-11-25 20:23:47,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276752243] [2021-11-25 20:23:47,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:47,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:23:47,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:23:47,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:23:47,564 INFO L87 Difference]: Start difference. First operand 1922 states and 2344 transitions. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 20:23:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:48,466 INFO L93 Difference]: Finished difference Result 5035 states and 6205 transitions. [2021-11-25 20:23:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:23:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 119 [2021-11-25 20:23:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:48,482 INFO L225 Difference]: With dead ends: 5035 [2021-11-25 20:23:48,482 INFO L226 Difference]: Without dead ends: 3280 [2021-11-25 20:23:48,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:23:48,487 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 266 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:48,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 1443 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:23:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-11-25 20:23:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2149. [2021-11-25 20:23:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 1585 states have (on average 1.2037854889589905) internal successors, (1908), 1604 states have internal predecessors, (1908), 343 states have call successors, (343), 220 states have call predecessors, (343), 220 states have return successors, (343), 324 states have call predecessors, (343), 343 states have call successors, (343) [2021-11-25 20:23:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 2594 transitions. [2021-11-25 20:23:48,748 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 2594 transitions. Word has length 119 [2021-11-25 20:23:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:48,749 INFO L470 AbstractCegarLoop]: Abstraction has 2149 states and 2594 transitions. [2021-11-25 20:23:48,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 20:23:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 2594 transitions. [2021-11-25 20:23:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 20:23:48,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:48,754 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-25 20:23:48,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 20:23:48,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 20:23:48,971 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:48,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:48,971 INFO L85 PathProgramCache]: Analyzing trace with hash -299411654, now seen corresponding path program 1 times [2021-11-25 20:23:48,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:48,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740117945] [2021-11-25 20:23:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:48,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-25 20:23:49,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740117945] [2021-11-25 20:23:49,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740117945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798568729] [2021-11-25 20:23:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:49,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:49,395 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:49,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:23:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:49,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:23:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-25 20:23:49,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:23:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-25 20:23:50,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798568729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:23:50,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [78322041] [2021-11-25 20:23:50,167 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2021-11-25 20:23:50,167 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:50,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:50,168 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:50,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:24:05,956 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 162 for LOIs [2021-11-25 20:24:08,859 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2021-11-25 20:24:08,861 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 22 for LOIs [2021-11-25 20:24:08,878 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 31 for LOIs [2021-11-25 20:24:08,886 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 22 for LOIs [2021-11-25 20:24:08,903 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 35 for LOIs [2021-11-25 20:24:08,936 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:24:28,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '125967#(and (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (= (mod ~side2Failed_History_1~0 256) 0) (= (mod ~side1Failed_History_2~0 256) (mod ~side1Failed_History_1~0 256)) (<= ~active_side_History_0~0 2) (= ~manual_selection_History_2~0 0) (not (= ~manual_selection_History_1~0 0)) (<= 0 (+ ~manual_selection_History_1~0 128)) (= (mod ~side1Failed_History_1~0 256) 0))' at error location [2021-11-25 20:24:28,536 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:24:28,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:24:28,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 27 [2021-11-25 20:24:28,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587813783] [2021-11-25 20:24:28,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:24:28,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 20:24:28,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:24:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 20:24:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=7522, Unknown=0, NotChecked=0, Total=8190 [2021-11-25 20:24:28,540 INFO L87 Difference]: Start difference. First operand 2149 states and 2594 transitions. Second operand has 27 states, 21 states have (on average 6.238095238095238) internal successors, (131), 23 states have internal predecessors, (131), 8 states have call successors, (38), 3 states have call predecessors, (38), 10 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-25 20:24:30,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:24:30,979 INFO L93 Difference]: Finished difference Result 6044 states and 8050 transitions. [2021-11-25 20:24:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 20:24:30,980 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 6.238095238095238) internal successors, (131), 23 states have internal predecessors, (131), 8 states have call successors, (38), 3 states have call predecessors, (38), 10 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) Word has length 127 [2021-11-25 20:24:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:24:30,997 INFO L225 Difference]: With dead ends: 6044 [2021-11-25 20:24:30,997 INFO L226 Difference]: Without dead ends: 4051 [2021-11-25 20:24:31,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 295 SyntacticMatches, 13 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=734, Invalid=9366, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 20:24:31,009 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 729 mSDsluCounter, 9912 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 10054 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:24:31,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 10054 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1966 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:24:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-11-25 20:24:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2149. [2021-11-25 20:24:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 1585 states have (on average 1.2025236593059936) internal successors, (1906), 1604 states have internal predecessors, (1906), 343 states have call successors, (343), 220 states have call predecessors, (343), 220 states have return successors, (343), 324 states have call predecessors, (343), 343 states have call successors, (343) [2021-11-25 20:24:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 2592 transitions. [2021-11-25 20:24:31,337 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 2592 transitions. Word has length 127 [2021-11-25 20:24:31,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:24:31,337 INFO L470 AbstractCegarLoop]: Abstraction has 2149 states and 2592 transitions. [2021-11-25 20:24:31,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 6.238095238095238) internal successors, (131), 23 states have internal predecessors, (131), 8 states have call successors, (38), 3 states have call predecessors, (38), 10 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-25 20:24:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 2592 transitions. [2021-11-25 20:24:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-25 20:24:31,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:31,343 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 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] [2021-11-25 20:24:31,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:24:31,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:24:31,559 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:24:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:31,559 INFO L85 PathProgramCache]: Analyzing trace with hash -37389077, now seen corresponding path program 1 times [2021-11-25 20:24:31,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:24:31,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067725232] [2021-11-25 20:24:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:31,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:24:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-25 20:24:31,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:24:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067725232] [2021-11-25 20:24:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067725232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:24:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389522001] [2021-11-25 20:24:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:31,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:24:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:24:31,749 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:24:31,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:24:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:31,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 20:24:31,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:24:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 20:24:32,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:24:32,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389522001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:24:32,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:24:32,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 11 [2021-11-25 20:24:32,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361805582] [2021-11-25 20:24:32,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:24:32,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:24:32,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:24:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:24:32,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:24:32,228 INFO L87 Difference]: Start difference. First operand 2149 states and 2592 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:24:33,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:24:33,173 INFO L93 Difference]: Finished difference Result 6146 states and 7770 transitions. [2021-11-25 20:24:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:24:33,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 135 [2021-11-25 20:24:33,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:24:33,188 INFO L225 Difference]: With dead ends: 6146 [2021-11-25 20:24:33,188 INFO L226 Difference]: Without dead ends: 4147 [2021-11-25 20:24:33,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:24:33,195 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 292 mSDsluCounter, 2102 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:24:33,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 2429 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:24:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-11-25 20:24:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 2909. [2021-11-25 20:24:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 2137 states have (on average 1.1927936359382312) internal successors, (2549), 2164 states have internal predecessors, (2549), 471 states have call successors, (471), 300 states have call predecessors, (471), 300 states have return successors, (471), 444 states have call predecessors, (471), 471 states have call successors, (471) [2021-11-25 20:24:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 3491 transitions. [2021-11-25 20:24:33,513 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 3491 transitions. Word has length 135 [2021-11-25 20:24:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:24:33,514 INFO L470 AbstractCegarLoop]: Abstraction has 2909 states and 3491 transitions. [2021-11-25 20:24:33,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:24:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 3491 transitions. [2021-11-25 20:24:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 20:24:33,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:33,520 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 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] [2021-11-25 20:24:33,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:24:33,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:24:33,747 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:24:33,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:33,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2029730723, now seen corresponding path program 1 times [2021-11-25 20:24:33,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:24:33,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529437861] [2021-11-25 20:24:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:33,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:24:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-25 20:24:35,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:24:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529437861] [2021-11-25 20:24:35,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529437861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:24:35,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931081880] [2021-11-25 20:24:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:35,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:24:35,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:24:35,102 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:24:35,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:24:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:35,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:24:35,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:24:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 20:24:35,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:24:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-25 20:24:36,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931081880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:24:36,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2145810105] [2021-11-25 20:24:36,631 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2021-11-25 20:24:36,631 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:24:36,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:24:36,632 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:24:36,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:24:43,884 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 74 for LOIs [2021-11-25 20:24:43,981 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2021-11-25 20:24:43,993 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 104 for LOIs [2021-11-25 20:24:44,137 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 109 for LOIs [2021-11-25 20:24:44,174 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 112 for LOIs [2021-11-25 20:24:44,282 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 120 for LOIs [2021-11-25 20:24:44,687 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:25:32,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '149919#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= ~s1p~0 0) (<= ~cs2~0 0) (<= 0 |#NULL.base|) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= 0 (+ ~s2s2_new~0 1)) (<= ~s2s1~0 0) (<= ~s2s2~0 0) (<= 0 (+ ~s2s1_new~0 1)) (<= (+ ~s1p_new~0 1) 0) (<= 0 ~s1s1~0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= 0 ~cs2~0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (<= ~s1s2~0 0) (<= 0 ~s2p~0) (<= ~s2p~0 0) (<= 0 ~cs1~0) (<= 0 ~s1p~0) (<= 0 (+ ~s1s2_new~0 1)) (<= |#NULL.offset| 0) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~manual_selection_History_2~0 0) (<= ~cs1~0 0) (<= 0 ~s2s2~0) (<= (+ ~nomsg~0 1) 0) (<= |#NULL.base| 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 ~s1s2~0) (<= ~s1s1~0 0) (<= 0 ~s2s1~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~cs2_new~0 1)) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0))' at error location [2021-11-25 20:25:32,271 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:25:32,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:25:32,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 14, 14] total 51 [2021-11-25 20:25:32,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589559033] [2021-11-25 20:25:32,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:25:32,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 20:25:32,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:25:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 20:25:32,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1833, Invalid=9723, Unknown=0, NotChecked=0, Total=11556 [2021-11-25 20:25:32,278 INFO L87 Difference]: Start difference. First operand 2909 states and 3491 transitions. Second operand has 51 states, 41 states have (on average 4.487804878048781) internal successors, (184), 41 states have internal predecessors, (184), 17 states have call successors, (50), 5 states have call predecessors, (50), 16 states have return successors, (49), 23 states have call predecessors, (49), 17 states have call successors, (49) [2021-11-25 20:25:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:25:38,560 INFO L93 Difference]: Finished difference Result 8198 states and 10819 transitions. [2021-11-25 20:25:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-25 20:25:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 41 states have (on average 4.487804878048781) internal successors, (184), 41 states have internal predecessors, (184), 17 states have call successors, (50), 5 states have call predecessors, (50), 16 states have return successors, (49), 23 states have call predecessors, (49), 17 states have call successors, (49) Word has length 142 [2021-11-25 20:25:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:25:38,579 INFO L225 Difference]: With dead ends: 8198 [2021-11-25 20:25:38,579 INFO L226 Difference]: Without dead ends: 5474 [2021-11-25 20:25:38,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 337 SyntacticMatches, 15 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5882 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=2275, Invalid=15815, Unknown=0, NotChecked=0, Total=18090 [2021-11-25 20:25:38,591 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 1355 mSDsluCounter, 13404 mSDsCounter, 0 mSdLazyCounter, 5891 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 13080 SdHoareTripleChecker+Invalid, 6263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 5891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:25:38,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1411 Valid, 13080 Invalid, 6263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 5891 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 20:25:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2021-11-25 20:25:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 2880. [2021-11-25 20:25:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2880 states, 2116 states have (on average 1.193289224952741) internal successors, (2525), 2142 states have internal predecessors, (2525), 466 states have call successors, (466), 297 states have call predecessors, (466), 297 states have return successors, (466), 440 states have call predecessors, (466), 466 states have call successors, (466) [2021-11-25 20:25:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3457 transitions. [2021-11-25 20:25:39,083 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3457 transitions. Word has length 142 [2021-11-25 20:25:39,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:25:39,083 INFO L470 AbstractCegarLoop]: Abstraction has 2880 states and 3457 transitions. [2021-11-25 20:25:39,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 41 states have (on average 4.487804878048781) internal successors, (184), 41 states have internal predecessors, (184), 17 states have call successors, (50), 5 states have call predecessors, (50), 16 states have return successors, (49), 23 states have call predecessors, (49), 17 states have call successors, (49) [2021-11-25 20:25:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3457 transitions. [2021-11-25 20:25:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 20:25:39,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:25:39,089 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:25:39,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:25:39,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-25 20:25:39,303 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:25:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:25:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1016743126, now seen corresponding path program 1 times [2021-11-25 20:25:39,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:25:39,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910252111] [2021-11-25 20:25:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:25:39,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:25:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:25:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-25 20:25:39,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:25:39,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910252111] [2021-11-25 20:25:39,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910252111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:25:39,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028348372] [2021-11-25 20:25:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:25:39,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:25:39,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:25:39,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:25:39,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:25:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:25:39,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:25:39,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:25:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 20:25:40,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:25:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-25 20:25:40,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028348372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:25:40,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491558570] [2021-11-25 20:25:40,331 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2021-11-25 20:25:40,331 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:25:40,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:25:40,332 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:25:40,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:26:38,577 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 74 for LOIs [2021-11-25 20:26:38,706 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 20:26:38,723 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 106 for LOIs [2021-11-25 20:26:38,884 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 115 for LOIs [2021-11-25 20:26:39,106 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 105 for LOIs [2021-11-25 20:26:39,169 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 105 for LOIs [2021-11-25 20:26:39,216 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:25,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165486#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= ~s1p~0 0) (<= ~cs2~0 0) (<= 0 |#NULL.base|) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= 0 (+ ~s2s2_new~0 1)) (<= ~active_side_History_1~0 2) (<= ~s2s1~0 0) (<= ~s2s2~0 0) (<= 0 (+ ~s2s1_new~0 1)) (<= (+ ~s1p_new~0 1) 0) (<= 0 ~s1s1~0) (<= 0 ~cs2~0) (<= ~manual_selection_History_0~0 127) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (<= ~s1s2~0 0) (<= 0 ~s2p~0) (<= 0 (+ ~manual_selection_History_2~0 128)) (<= ~s2p~0 0) (<= ~manual_selection_History_1~0 127) (<= 0 ~cs1~0) (<= 0 ~s1p~0) (<= 0 (+ ~s1s2_new~0 1)) (<= |#NULL.offset| 0) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~active_side_History_0~0 2) (<= ~manual_selection_History_2~0 127) (not (= 2 ~active_side_History_0~0)) (<= ~cs1~0 0) (<= 0 ~s2s2~0) (<= (+ ~nomsg~0 1) 0) (<= |#NULL.base| 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 ~s1s2~0) (<= ~s1s1~0 0) (<= 0 ~s2s1~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~cs2_new~0 1)) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0))' at error location [2021-11-25 20:27:25,644 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:27:25,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:27:25,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 7] total 11 [2021-11-25 20:27:25,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003066414] [2021-11-25 20:27:25,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:27:25,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:27:25,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:27:25,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=5083, Unknown=0, NotChecked=0, Total=5700 [2021-11-25 20:27:25,647 INFO L87 Difference]: Start difference. First operand 2880 states and 3457 transitions. Second operand has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 7 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (35), 7 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-25 20:27:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:27,568 INFO L93 Difference]: Finished difference Result 8514 states and 11382 transitions. [2021-11-25 20:27:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:27:27,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 7 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (35), 7 states have call predecessors, (35), 7 states have call successors, (35) Word has length 144 [2021-11-25 20:27:27,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:27,588 INFO L225 Difference]: With dead ends: 8514 [2021-11-25 20:27:27,589 INFO L226 Difference]: Without dead ends: 5829 [2021-11-25 20:27:27,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 355 SyntacticMatches, 12 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3065 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=826, Invalid=6830, Unknown=0, NotChecked=0, Total=7656 [2021-11-25 20:27:27,596 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 3010 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 1225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3010 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1225 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:27,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3010 Valid, 701 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1225 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:27:27,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5829 states. [2021-11-25 20:27:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5829 to 3110. [2021-11-25 20:27:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 2304 states have (on average 1.1979166666666667) internal successors, (2760), 2329 states have internal predecessors, (2760), 487 states have call successors, (487), 318 states have call predecessors, (487), 318 states have return successors, (487), 462 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-25 20:27:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 3734 transitions. [2021-11-25 20:27:28,179 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 3734 transitions. Word has length 144 [2021-11-25 20:27:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:28,180 INFO L470 AbstractCegarLoop]: Abstraction has 3110 states and 3734 transitions. [2021-11-25 20:27:28,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 7 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (35), 7 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-25 20:27:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 3734 transitions. [2021-11-25 20:27:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 20:27:28,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:28,186 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:28,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:28,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:28,415 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:28,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:28,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1261611915, now seen corresponding path program 1 times [2021-11-25 20:27:28,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:28,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347801619] [2021-11-25 20:27:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:28,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-25 20:27:28,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347801619] [2021-11-25 20:27:28,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347801619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647771259] [2021-11-25 20:27:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:28,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:28,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:28,667 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:28,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:27:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:28,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 20:27:28,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 20:27:29,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:27:29,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647771259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:29,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:27:29,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-25 20:27:29,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276599947] [2021-11-25 20:27:29,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:29,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:27:29,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:27:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:27:29,134 INFO L87 Difference]: Start difference. First operand 3110 states and 3734 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:27:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:29,982 INFO L93 Difference]: Finished difference Result 6708 states and 8361 transitions. [2021-11-25 20:27:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:27:29,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 144 [2021-11-25 20:27:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:29,993 INFO L225 Difference]: With dead ends: 6708 [2021-11-25 20:27:29,994 INFO L226 Difference]: Without dead ends: 3781 [2021-11-25 20:27:29,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:27:29,999 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 446 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:30,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 1669 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:27:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2021-11-25 20:27:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 3110. [2021-11-25 20:27:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 2304 states have (on average 1.1931423611111112) internal successors, (2749), 2329 states have internal predecessors, (2749), 487 states have call successors, (487), 318 states have call predecessors, (487), 318 states have return successors, (487), 462 states have call predecessors, (487), 487 states have call successors, (487) [2021-11-25 20:27:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 3723 transitions. [2021-11-25 20:27:30,482 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 3723 transitions. Word has length 144 [2021-11-25 20:27:30,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:30,483 INFO L470 AbstractCegarLoop]: Abstraction has 3110 states and 3723 transitions. [2021-11-25 20:27:30,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:27:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 3723 transitions. [2021-11-25 20:27:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 20:27:30,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:30,489 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:30,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:30,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:30,715 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:30,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:30,715 INFO L85 PathProgramCache]: Analyzing trace with hash -396107047, now seen corresponding path program 1 times [2021-11-25 20:27:30,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:30,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258605657] [2021-11-25 20:27:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:30,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-25 20:27:30,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:30,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258605657] [2021-11-25 20:27:30,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258605657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:30,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:30,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:27:30,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133472522] [2021-11-25 20:27:30,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:30,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:27:30,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:30,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:27:30,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:27:30,805 INFO L87 Difference]: Start difference. First operand 3110 states and 3723 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 20:27:32,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:32,371 INFO L93 Difference]: Finished difference Result 10796 states and 13737 transitions. [2021-11-25 20:27:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:27:32,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-11-25 20:27:32,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:32,395 INFO L225 Difference]: With dead ends: 10796 [2021-11-25 20:27:32,395 INFO L226 Difference]: Without dead ends: 7908 [2021-11-25 20:27:32,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:27:32,403 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 466 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:32,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 2106 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:27:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7908 states. [2021-11-25 20:27:33,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7908 to 5185. [2021-11-25 20:27:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5185 states, 3801 states have (on average 1.185214417258616) internal successors, (4505), 3845 states have internal predecessors, (4505), 853 states have call successors, (853), 530 states have call predecessors, (853), 530 states have return successors, (853), 809 states have call predecessors, (853), 853 states have call successors, (853) [2021-11-25 20:27:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 6211 transitions. [2021-11-25 20:27:33,097 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 6211 transitions. Word has length 145 [2021-11-25 20:27:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:33,097 INFO L470 AbstractCegarLoop]: Abstraction has 5185 states and 6211 transitions. [2021-11-25 20:27:33,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 20:27:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 6211 transitions. [2021-11-25 20:27:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 20:27:33,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:33,106 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:33,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-25 20:27:33,107 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1106790867, now seen corresponding path program 1 times [2021-11-25 20:27:33,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:33,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665833048] [2021-11-25 20:27:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:33,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-25 20:27:33,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:33,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665833048] [2021-11-25 20:27:33,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665833048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:33,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136436901] [2021-11-25 20:27:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:33,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:33,283 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:33,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:27:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:33,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:27:33,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 69 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 20:27:34,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-25 20:27:34,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136436901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:27:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448046008] [2021-11-25 20:27:34,747 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2021-11-25 20:27:34,747 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:27:34,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:27:34,748 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:27:34,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:28:39,231 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 74 for LOIs [2021-11-25 20:28:39,329 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 20:28:39,341 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 106 for LOIs [2021-11-25 20:28:39,443 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 115 for LOIs [2021-11-25 20:28:39,607 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 105 for LOIs [2021-11-25 20:28:39,654 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 105 for LOIs [2021-11-25 20:28:39,701 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:29:32,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '215750#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= ~s1p~0 0) (<= ~cs2~0 0) (<= 0 |#NULL.base|) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= 0 (+ ~s2s2_new~0 1)) (<= ~active_side_History_1~0 2) (<= ~s2s1~0 0) (<= ~s2s2~0 0) (<= 0 (+ ~s2s1_new~0 1)) (<= (+ ~s1p_new~0 1) 0) (<= 0 ~s1s1~0) (<= 0 ~cs2~0) (<= ~manual_selection_History_0~0 127) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (<= ~s1s2~0 0) (<= 0 ~s2p~0) (<= 0 (+ ~manual_selection_History_2~0 128)) (<= ~s2p~0 0) (<= ~manual_selection_History_1~0 127) (<= 0 ~cs1~0) (<= 0 ~s1p~0) (<= 0 (+ ~s1s2_new~0 1)) (<= |#NULL.offset| 0) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~active_side_History_0~0 2) (<= ~manual_selection_History_2~0 127) (not (= 2 ~active_side_History_0~0)) (<= ~cs1~0 0) (<= 0 ~s2s2~0) (<= (+ ~nomsg~0 1) 0) (<= |#NULL.base| 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 ~s1s2~0) (<= ~s1s1~0 0) (<= 0 ~s2s1~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~cs2_new~0 1)) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0))' at error location [2021-11-25 20:29:32,879 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:29:32,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:29:32,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2021-11-25 20:29:32,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069002113] [2021-11-25 20:29:32,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:29:32,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 20:29:32,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:32,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 20:29:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=7081, Unknown=0, NotChecked=0, Total=8010 [2021-11-25 20:29:32,882 INFO L87 Difference]: Start difference. First operand 5185 states and 6211 transitions. Second operand has 24 states, 24 states have (on average 8.125) internal successors, (195), 24 states have internal predecessors, (195), 9 states have call successors, (46), 5 states have call predecessors, (46), 5 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2021-11-25 20:29:36,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:36,186 INFO L93 Difference]: Finished difference Result 12879 states and 16275 transitions. [2021-11-25 20:29:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 20:29:36,186 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 8.125) internal successors, (195), 24 states have internal predecessors, (195), 9 states have call successors, (46), 5 states have call predecessors, (46), 5 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) Word has length 147 [2021-11-25 20:29:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:36,215 INFO L225 Difference]: With dead ends: 12879 [2021-11-25 20:29:36,215 INFO L226 Difference]: Without dead ends: 7916 [2021-11-25 20:29:36,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 353 SyntacticMatches, 10 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4583 ImplicationChecksByTransitivity, 54.3s TimeCoverageRelationStatistics Valid=1183, Invalid=9947, Unknown=0, NotChecked=0, Total=11130 [2021-11-25 20:29:36,231 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 2404 mSDsluCounter, 2185 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 1116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1116 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:36,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2404 Valid, 2459 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1116 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 20:29:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2021-11-25 20:29:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 5826. [2021-11-25 20:29:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5826 states, 4279 states have (on average 1.1843888759055854) internal successors, (5068), 4329 states have internal predecessors, (5068), 950 states have call successors, (950), 596 states have call predecessors, (950), 596 states have return successors, (950), 900 states have call predecessors, (950), 950 states have call successors, (950) [2021-11-25 20:29:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5826 states to 5826 states and 6968 transitions. [2021-11-25 20:29:37,139 INFO L78 Accepts]: Start accepts. Automaton has 5826 states and 6968 transitions. Word has length 147 [2021-11-25 20:29:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:37,139 INFO L470 AbstractCegarLoop]: Abstraction has 5826 states and 6968 transitions. [2021-11-25 20:29:37,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.125) internal successors, (195), 24 states have internal predecessors, (195), 9 states have call successors, (46), 5 states have call predecessors, (46), 5 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2021-11-25 20:29:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5826 states and 6968 transitions. [2021-11-25 20:29:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 20:29:37,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:37,149 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:37,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:29:37,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-25 20:29:37,363 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1766537100, now seen corresponding path program 1 times [2021-11-25 20:29:37,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:37,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096566635] [2021-11-25 20:29:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:37,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-25 20:29:37,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:37,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096566635] [2021-11-25 20:29:37,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096566635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:29:37,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920752163] [2021-11-25 20:29:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:37,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:37,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:37,543 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:29:37,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441935fb-99b2-4f46-a044-8a40f6e38b6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:29:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:37,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:29:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:29:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 70 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 20:29:38,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:29:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-25 20:29:38,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920752163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:29:38,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093342483] [2021-11-25 20:29:38,774 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2021-11-25 20:29:38,774 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:29:38,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:29:38,775 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:29:38,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs