./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label40.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH --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 f0697d9089c8f644e106fd291328f66f211f5f9eb49bfcc0a5bab680b0bbbbc1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:13:37,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:13:37,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:13:37,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:13:37,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:13:37,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:13:37,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:13:37,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:13:37,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:13:37,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:13:37,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:13:37,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:13:37,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:13:37,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:13:37,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:13:37,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:13:37,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:13:37,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:13:37,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:13:37,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:13:37,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:13:37,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:13:37,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:13:37,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:13:37,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:13:37,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:13:37,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:13:37,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:13:37,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:13:37,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:13:37,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:13:37,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:13:37,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:13:37,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:13:37,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:13:37,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:13:37,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:13:37,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:13:37,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:13:37,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:13:37,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:13:37,648 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:13:37,690 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:13:37,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:13:37,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:13:37,696 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:13:37,696 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:13:37,697 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:13:37,697 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:13:37,697 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:13:37,702 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:13:37,702 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:13:37,703 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:13:37,703 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:13:37,703 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:13:37,703 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:13:37,703 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:13:37,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:13:37,704 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:13:37,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:13:37,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:13:37,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:13:37,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:13:37,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:13:37,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:13:37,706 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:13:37,706 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:13:37,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:13:37,706 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:13:37,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:13:37,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:13:37,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:13:37,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:13:37,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:13:37,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:13:37,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:13:37,708 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:13:37,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:13:37,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:13:37,709 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:13:37,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:13:37,709 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_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0697d9089c8f644e106fd291328f66f211f5f9eb49bfcc0a5bab680b0bbbbc1 [2021-11-03 05:13:37,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:13:37,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:13:37,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:13:37,993 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:13:37,994 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:13:37,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/eca-rers2012/Problem02_label40.c [2021-11-03 05:13:38,093 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/data/1589d8d7d/aa2ec9b63bab45799a585fe69ebe531d/FLAGd7fc6fe82 [2021-11-03 05:13:38,660 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:13:38,661 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/sv-benchmarks/c/eca-rers2012/Problem02_label40.c [2021-11-03 05:13:38,692 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/data/1589d8d7d/aa2ec9b63bab45799a585fe69ebe531d/FLAGd7fc6fe82 [2021-11-03 05:13:38,898 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/data/1589d8d7d/aa2ec9b63bab45799a585fe69ebe531d [2021-11-03 05:13:38,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:13:38,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:13:38,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:13:38,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:13:38,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:13:38,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:13:38" (1/1) ... [2021-11-03 05:13:38,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d89c485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:38, skipping insertion in model container [2021-11-03 05:13:38,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:13:38" (1/1) ... [2021-11-03 05:13:38,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:13:38,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:13:39,279 WARN L228 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_ef738d8f-d706-4094-9d64-ac0c58ab618b/sv-benchmarks/c/eca-rers2012/Problem02_label40.c[15538,15551] [2021-11-03 05:13:39,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:13:39,371 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:13:39,465 WARN L228 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_ef738d8f-d706-4094-9d64-ac0c58ab618b/sv-benchmarks/c/eca-rers2012/Problem02_label40.c[15538,15551] [2021-11-03 05:13:39,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:13:39,499 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:13:39,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39 WrapperNode [2021-11-03 05:13:39,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:13:39,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:13:39,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:13:39,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:13:39,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (1/1) ... [2021-11-03 05:13:39,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (1/1) ... [2021-11-03 05:13:39,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:13:39,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:13:39,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:13:39,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:13:39,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (1/1) ... [2021-11-03 05:13:39,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (1/1) ... [2021-11-03 05:13:39,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (1/1) ... [2021-11-03 05:13:39,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (1/1) ... [2021-11-03 05:13:39,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (1/1) ... [2021-11-03 05:13:39,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (1/1) ... [2021-11-03 05:13:39,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (1/1) ... [2021-11-03 05:13:39,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:13:39,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:13:39,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:13:39,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:13:39,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (1/1) ... [2021-11-03 05:13:39,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:13:39,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:13:39,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:13:39,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:13:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:13:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:13:39,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:13:39,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:13:41,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:13:41,670 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 05:13:41,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:13:41 BoogieIcfgContainer [2021-11-03 05:13:41,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:13:41,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:13:41,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:13:41,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:13:41,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:13:38" (1/3) ... [2021-11-03 05:13:41,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eccead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:13:41, skipping insertion in model container [2021-11-03 05:13:41,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:13:39" (2/3) ... [2021-11-03 05:13:41,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eccead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:13:41, skipping insertion in model container [2021-11-03 05:13:41,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:13:41" (3/3) ... [2021-11-03 05:13:41,683 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label40.c [2021-11-03 05:13:41,691 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:13:41,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:13:41,753 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:13:41,763 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 [2021-11-03 05:13:41,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:13:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 05:13:41,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:41,793 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:41,794 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1814570708, now seen corresponding path program 1 times [2021-11-03 05:13:41,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:41,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652470737] [2021-11-03 05:13:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:41,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:42,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:42,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652470737] [2021-11-03 05:13:42,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652470737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:42,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:42,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:13:42,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928529653] [2021-11-03 05:13:42,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:42,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:42,191 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:42,627 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2021-11-03 05:13:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-03 05:13:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:42,647 INFO L225 Difference]: With dead ends: 251 [2021-11-03 05:13:42,648 INFO L226 Difference]: Without dead ends: 163 [2021-11-03 05:13:42,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:42,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-03 05:13:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-03 05:13:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.808641975308642) internal successors, (293), 162 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 293 transitions. [2021-11-03 05:13:42,727 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 293 transitions. Word has length 80 [2021-11-03 05:13:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:42,729 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 293 transitions. [2021-11-03 05:13:42,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 293 transitions. [2021-11-03 05:13:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-03 05:13:42,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:42,736 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:42,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:13:42,736 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:42,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1153885741, now seen corresponding path program 1 times [2021-11-03 05:13:42,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:42,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446788724] [2021-11-03 05:13:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:42,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:42,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:42,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446788724] [2021-11-03 05:13:42,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446788724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:42,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:42,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:13:42,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756202314] [2021-11-03 05:13:42,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:42,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:42,861 INFO L87 Difference]: Start difference. First operand 163 states and 293 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:43,207 INFO L93 Difference]: Finished difference Result 485 states and 876 transitions. [2021-11-03 05:13:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:43,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-03 05:13:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:43,212 INFO L225 Difference]: With dead ends: 485 [2021-11-03 05:13:43,212 INFO L226 Difference]: Without dead ends: 323 [2021-11-03 05:13:43,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-03 05:13:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-11-03 05:13:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5031055900621118) internal successors, (484), 322 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 484 transitions. [2021-11-03 05:13:43,245 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 484 transitions. Word has length 88 [2021-11-03 05:13:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:43,246 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 484 transitions. [2021-11-03 05:13:43,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 484 transitions. [2021-11-03 05:13:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 05:13:43,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:43,256 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:43,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:13:43,257 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:43,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1787483967, now seen corresponding path program 1 times [2021-11-03 05:13:43,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:43,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187009859] [2021-11-03 05:13:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:43,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:43,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:43,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187009859] [2021-11-03 05:13:43,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187009859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:43,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:43,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:13:43,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525645396] [2021-11-03 05:13:43,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:43,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:43,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:43,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:43,387 INFO L87 Difference]: Start difference. First operand 323 states and 484 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:43,701 INFO L93 Difference]: Finished difference Result 965 states and 1449 transitions. [2021-11-03 05:13:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-03 05:13:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:43,707 INFO L225 Difference]: With dead ends: 965 [2021-11-03 05:13:43,707 INFO L226 Difference]: Without dead ends: 643 [2021-11-03 05:13:43,709 INFO L786 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 [2021-11-03 05:13:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-03 05:13:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 563. [2021-11-03 05:13:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.4572953736654803) internal successors, (819), 562 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 819 transitions. [2021-11-03 05:13:43,748 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 819 transitions. Word has length 89 [2021-11-03 05:13:43,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:43,749 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 819 transitions. [2021-11-03 05:13:43,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 819 transitions. [2021-11-03 05:13:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-03 05:13:43,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:43,754 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:43,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:13:43,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1696179608, now seen corresponding path program 1 times [2021-11-03 05:13:43,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:43,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532684989] [2021-11-03 05:13:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:43,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:43,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:43,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532684989] [2021-11-03 05:13:43,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532684989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:43,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:43,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:13:43,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895011513] [2021-11-03 05:13:43,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:43,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:43,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:43,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:43,819 INFO L87 Difference]: Start difference. First operand 563 states and 819 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:44,146 INFO L93 Difference]: Finished difference Result 1605 states and 2358 transitions. [2021-11-03 05:13:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:44,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-03 05:13:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:44,153 INFO L225 Difference]: With dead ends: 1605 [2021-11-03 05:13:44,153 INFO L226 Difference]: Without dead ends: 1043 [2021-11-03 05:13:44,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-03 05:13:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1043. [2021-11-03 05:13:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 1.3915547024952015) internal successors, (1450), 1042 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1450 transitions. [2021-11-03 05:13:44,203 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1450 transitions. Word has length 90 [2021-11-03 05:13:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:44,203 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1450 transitions. [2021-11-03 05:13:44,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1450 transitions. [2021-11-03 05:13:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-03 05:13:44,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:44,207 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:44,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:13:44,208 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash -699184394, now seen corresponding path program 1 times [2021-11-03 05:13:44,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:44,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13845019] [2021-11-03 05:13:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:44,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-03 05:13:44,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:44,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13845019] [2021-11-03 05:13:44,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13845019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:13:44,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993697452] [2021-11-03 05:13:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:44,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:13:44,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:13:44,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:13:44,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:13:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:13:44,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-03 05:13:44,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-03 05:13:44,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993697452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:44,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-03 05:13:44,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-11-03 05:13:44,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594654863] [2021-11-03 05:13:44,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:44,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:44,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:44,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:13:44,980 INFO L87 Difference]: Start difference. First operand 1043 states and 1450 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:45,352 INFO L93 Difference]: Finished difference Result 2645 states and 3697 transitions. [2021-11-03 05:13:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:45,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-03 05:13:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:45,362 INFO L225 Difference]: With dead ends: 2645 [2021-11-03 05:13:45,362 INFO L226 Difference]: Without dead ends: 1523 [2021-11-03 05:13:45,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:13:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-11-03 05:13:45,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1523. [2021-11-03 05:13:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 1.3515111695137976) internal successors, (2057), 1522 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2057 transitions. [2021-11-03 05:13:45,405 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2057 transitions. Word has length 93 [2021-11-03 05:13:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:45,406 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 2057 transitions. [2021-11-03 05:13:45,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2057 transitions. [2021-11-03 05:13:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-03 05:13:45,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:45,409 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:45,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-03 05:13:45,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:13:45,623 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1651147755, now seen corresponding path program 1 times [2021-11-03 05:13:45,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:45,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521931772] [2021-11-03 05:13:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:45,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-03 05:13:45,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:45,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521931772] [2021-11-03 05:13:45,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521931772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:45,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:45,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:13:45,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076764802] [2021-11-03 05:13:45,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:45,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:45,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:45,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:45,712 INFO L87 Difference]: Start difference. First operand 1523 states and 2057 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:46,068 INFO L93 Difference]: Finished difference Result 3445 states and 4740 transitions. [2021-11-03 05:13:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:46,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-03 05:13:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:46,079 INFO L225 Difference]: With dead ends: 3445 [2021-11-03 05:13:46,080 INFO L226 Difference]: Without dead ends: 1923 [2021-11-03 05:13:46,082 INFO L786 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 [2021-11-03 05:13:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-11-03 05:13:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1843. [2021-11-03 05:13:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 1.3165038002171552) internal successors, (2425), 1842 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2425 transitions. [2021-11-03 05:13:46,129 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2425 transitions. Word has length 97 [2021-11-03 05:13:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:46,130 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 2425 transitions. [2021-11-03 05:13:46,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2425 transitions. [2021-11-03 05:13:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-03 05:13:46,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:46,134 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-03 05:13:46,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:13:46,135 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:46,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:46,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1105143515, now seen corresponding path program 1 times [2021-11-03 05:13:46,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:46,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896588367] [2021-11-03 05:13:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:46,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:46,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:46,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896588367] [2021-11-03 05:13:46,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896588367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:46,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:46,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:13:46,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237442539] [2021-11-03 05:13:46,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:46,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:46,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:46,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:46,219 INFO L87 Difference]: Start difference. First operand 1843 states and 2425 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:46,601 INFO L93 Difference]: Finished difference Result 4005 states and 5238 transitions. [2021-11-03 05:13:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:46,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-03 05:13:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:46,612 INFO L225 Difference]: With dead ends: 4005 [2021-11-03 05:13:46,613 INFO L226 Difference]: Without dead ends: 2163 [2021-11-03 05:13:46,631 INFO L786 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 [2021-11-03 05:13:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-11-03 05:13:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 2163. [2021-11-03 05:13:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 1.2645698427382053) internal successors, (2734), 2162 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 2734 transitions. [2021-11-03 05:13:46,725 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 2734 transitions. Word has length 109 [2021-11-03 05:13:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:46,725 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 2734 transitions. [2021-11-03 05:13:46,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:46,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 2734 transitions. [2021-11-03 05:13:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-03 05:13:46,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:46,733 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:46,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:13:46,733 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1445111342, now seen corresponding path program 1 times [2021-11-03 05:13:46,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:46,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083436364] [2021-11-03 05:13:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:46,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-03 05:13:46,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:46,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083436364] [2021-11-03 05:13:46,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083436364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:46,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:46,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:13:46,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805419327] [2021-11-03 05:13:46,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:46,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:46,789 INFO L87 Difference]: Start difference. First operand 2163 states and 2734 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:47,117 INFO L93 Difference]: Finished difference Result 4325 states and 5467 transitions. [2021-11-03 05:13:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:47,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-03 05:13:47,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:47,128 INFO L225 Difference]: With dead ends: 4325 [2021-11-03 05:13:47,129 INFO L226 Difference]: Without dead ends: 2163 [2021-11-03 05:13:47,133 INFO L786 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 [2021-11-03 05:13:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-11-03 05:13:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 2163. [2021-11-03 05:13:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 1.2391304347826086) internal successors, (2679), 2162 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 2679 transitions. [2021-11-03 05:13:47,191 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 2679 transitions. Word has length 118 [2021-11-03 05:13:47,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:47,191 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 2679 transitions. [2021-11-03 05:13:47,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 2679 transitions. [2021-11-03 05:13:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-03 05:13:47,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:47,196 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:47,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:13:47,197 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1806907490, now seen corresponding path program 1 times [2021-11-03 05:13:47,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:47,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307833716] [2021-11-03 05:13:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:47,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-03 05:13:47,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307833716] [2021-11-03 05:13:47,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307833716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:47,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:47,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:13:47,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812212707] [2021-11-03 05:13:47,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:47,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:47,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:47,290 INFO L87 Difference]: Start difference. First operand 2163 states and 2679 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:47,508 INFO L93 Difference]: Finished difference Result 3925 states and 4897 transitions. [2021-11-03 05:13:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:47,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-03 05:13:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:47,517 INFO L225 Difference]: With dead ends: 3925 [2021-11-03 05:13:47,517 INFO L226 Difference]: Without dead ends: 1683 [2021-11-03 05:13:47,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-11-03 05:13:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1683. [2021-11-03 05:13:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 1.2045184304399525) internal successors, (2026), 1682 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 2026 transitions. [2021-11-03 05:13:47,561 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 2026 transitions. Word has length 139 [2021-11-03 05:13:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:47,561 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 2026 transitions. [2021-11-03 05:13:47,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:47,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 2026 transitions. [2021-11-03 05:13:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-03 05:13:47,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:47,566 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-03 05:13:47,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:13:47,566 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1029744745, now seen corresponding path program 1 times [2021-11-03 05:13:47,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:47,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005418627] [2021-11-03 05:13:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:47,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 05:13:47,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:47,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005418627] [2021-11-03 05:13:47,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005418627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:47,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:47,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:13:47,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351894739] [2021-11-03 05:13:47,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:47,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:47,623 INFO L87 Difference]: Start difference. First operand 1683 states and 2026 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:47,924 INFO L93 Difference]: Finished difference Result 3605 states and 4407 transitions. [2021-11-03 05:13:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-03 05:13:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:47,935 INFO L225 Difference]: With dead ends: 3605 [2021-11-03 05:13:47,935 INFO L226 Difference]: Without dead ends: 2003 [2021-11-03 05:13:47,937 INFO L786 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 [2021-11-03 05:13:47,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-11-03 05:13:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1523. [2021-11-03 05:13:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 1.216819973718791) internal successors, (1852), 1522 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 1852 transitions. [2021-11-03 05:13:47,976 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 1852 transitions. Word has length 152 [2021-11-03 05:13:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:47,977 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 1852 transitions. [2021-11-03 05:13:47,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 1852 transitions. [2021-11-03 05:13:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-03 05:13:47,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:47,981 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:47,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:13:47,982 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1186107752, now seen corresponding path program 1 times [2021-11-03 05:13:47,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:47,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618749355] [2021-11-03 05:13:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:47,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 05:13:48,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:48,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618749355] [2021-11-03 05:13:48,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618749355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:48,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:48,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:13:48,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716326417] [2021-11-03 05:13:48,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:48,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:48,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:48,071 INFO L87 Difference]: Start difference. First operand 1523 states and 1852 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:48,329 INFO L93 Difference]: Finished difference Result 2565 states and 3086 transitions. [2021-11-03 05:13:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-03 05:13:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:48,336 INFO L225 Difference]: With dead ends: 2565 [2021-11-03 05:13:48,337 INFO L226 Difference]: Without dead ends: 1203 [2021-11-03 05:13:48,339 INFO L786 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 [2021-11-03 05:13:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-11-03 05:13:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1203. [2021-11-03 05:13:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.1106489184692179) internal successors, (1335), 1202 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1335 transitions. [2021-11-03 05:13:48,375 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1335 transitions. Word has length 165 [2021-11-03 05:13:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:48,375 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1335 transitions. [2021-11-03 05:13:48,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1335 transitions. [2021-11-03 05:13:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-03 05:13:48,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:48,380 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-03 05:13:48,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 05:13:48,385 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:48,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1927550809, now seen corresponding path program 1 times [2021-11-03 05:13:48,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:48,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581698991] [2021-11-03 05:13:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:48,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:48,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:48,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581698991] [2021-11-03 05:13:48,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581698991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:48,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:48,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:13:48,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343540673] [2021-11-03 05:13:48,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:13:48,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:48,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:13:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:48,476 INFO L87 Difference]: Start difference. First operand 1203 states and 1335 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:48,823 INFO L93 Difference]: Finished difference Result 2325 states and 2586 transitions. [2021-11-03 05:13:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:13:48,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-03 05:13:48,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:48,830 INFO L225 Difference]: With dead ends: 2325 [2021-11-03 05:13:48,830 INFO L226 Difference]: Without dead ends: 1203 [2021-11-03 05:13:48,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-11-03 05:13:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1203. [2021-11-03 05:13:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.1073211314475873) internal successors, (1331), 1202 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1331 transitions. [2021-11-03 05:13:48,867 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1331 transitions. Word has length 178 [2021-11-03 05:13:48,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:48,867 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1331 transitions. [2021-11-03 05:13:48,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:48,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1331 transitions. [2021-11-03 05:13:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-03 05:13:48,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:48,872 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:48,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 05:13:48,872 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:48,873 INFO L85 PathProgramCache]: Analyzing trace with hash -32399723, now seen corresponding path program 1 times [2021-11-03 05:13:48,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:48,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132202957] [2021-11-03 05:13:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:48,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 93 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:49,109 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:49,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132202957] [2021-11-03 05:13:49,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132202957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:13:49,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733831094] [2021-11-03 05:13:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:49,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:13:49,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:13:49,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:13:49,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 05:13:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:49,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:13:49,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 05:13:49,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 05:13:50,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733831094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:50,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-03 05:13:50,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-03 05:13:50,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390117729] [2021-11-03 05:13:50,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:50,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:50,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:50,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:13:50,358 INFO L87 Difference]: Start difference. First operand 1203 states and 1331 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:50,595 INFO L93 Difference]: Finished difference Result 2645 states and 2951 transitions. [2021-11-03 05:13:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:50,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-11-03 05:13:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:50,604 INFO L225 Difference]: With dead ends: 2645 [2021-11-03 05:13:50,604 INFO L226 Difference]: Without dead ends: 1523 [2021-11-03 05:13:50,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:13:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-11-03 05:13:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 963. [2021-11-03 05:13:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.0966735966735968) internal successors, (1055), 962 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1055 transitions. [2021-11-03 05:13:50,634 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1055 transitions. Word has length 210 [2021-11-03 05:13:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:50,635 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1055 transitions. [2021-11-03 05:13:50,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1055 transitions. [2021-11-03 05:13:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-03 05:13:50,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:50,640 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-03 05:13:50,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-03 05:13:50,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-03 05:13:50,862 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2080704400, now seen corresponding path program 1 times [2021-11-03 05:13:50,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:50,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715189136] [2021-11-03 05:13:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:50,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 05:13:50,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:50,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715189136] [2021-11-03 05:13:50,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715189136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:50,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:50,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:13:50,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561549604] [2021-11-03 05:13:50,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:13:50,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:50,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:13:50,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:50,959 INFO L87 Difference]: Start difference. First operand 963 states and 1055 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:51,311 INFO L93 Difference]: Finished difference Result 1845 states and 2026 transitions. [2021-11-03 05:13:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:13:51,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2021-11-03 05:13:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:51,317 INFO L225 Difference]: With dead ends: 1845 [2021-11-03 05:13:51,317 INFO L226 Difference]: Without dead ends: 963 [2021-11-03 05:13:51,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-03 05:13:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-11-03 05:13:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.0935550935550935) internal successors, (1052), 962 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1052 transitions. [2021-11-03 05:13:51,340 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1052 transitions. Word has length 223 [2021-11-03 05:13:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:51,340 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1052 transitions. [2021-11-03 05:13:51,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1052 transitions. [2021-11-03 05:13:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-03 05:13:51,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:51,346 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:51,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 05:13:51,347 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1957343947, now seen corresponding path program 1 times [2021-11-03 05:13:51,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:51,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54553943] [2021-11-03 05:13:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:51,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 192 proven. 177 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-03 05:13:51,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:51,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54553943] [2021-11-03 05:13:51,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54553943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:13:51,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779218869] [2021-11-03 05:13:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:51,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:13:51,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:13:51,550 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:13:51,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 05:13:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:51,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:13:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-03 05:13:54,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-03 05:13:56,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779218869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:56,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-03 05:13:56,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 9 [2021-11-03 05:13:56,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420951902] [2021-11-03 05:13:56,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:13:56,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:13:56,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:13:56,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:13:56,597 INFO L87 Difference]: Start difference. First operand 963 states and 1052 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:57,061 INFO L93 Difference]: Finished difference Result 1925 states and 2102 transitions. [2021-11-03 05:13:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:13:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-11-03 05:13:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:57,067 INFO L225 Difference]: With dead ends: 1925 [2021-11-03 05:13:57,067 INFO L226 Difference]: Without dead ends: 883 [2021-11-03 05:13:57,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:13:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-11-03 05:13:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2021-11-03 05:13:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.0861678004535147) internal successors, (958), 882 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 958 transitions. [2021-11-03 05:13:57,089 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 958 transitions. Word has length 273 [2021-11-03 05:13:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:57,090 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 958 transitions. [2021-11-03 05:13:57,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 958 transitions. [2021-11-03 05:13:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-03 05:13:57,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:57,097 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:57,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:57,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-03 05:13:57,318 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:13:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash -945924387, now seen corresponding path program 1 times [2021-11-03 05:13:57,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:13:57,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984613877] [2021-11-03 05:13:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:57,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:13:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 197 proven. 197 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-03 05:13:57,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:13:57,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984613877] [2021-11-03 05:13:57,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984613877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:13:57,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307264474] [2021-11-03 05:13:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:57,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:13:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:13:57,550 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:13:57,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 05:13:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:58,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:13:58,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-03 05:13:59,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-03 05:14:00,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307264474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:14:00,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-03 05:14:00,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 9 [2021-11-03 05:14:00,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181976205] [2021-11-03 05:14:00,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:14:00,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:14:00,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:14:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:14:00,609 INFO L87 Difference]: Start difference. First operand 883 states and 958 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:00,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:00,959 INFO L93 Difference]: Finished difference Result 1363 states and 1464 transitions. [2021-11-03 05:14:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:14:00,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 278 [2021-11-03 05:14:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:00,960 INFO L225 Difference]: With dead ends: 1363 [2021-11-03 05:14:00,961 INFO L226 Difference]: Without dead ends: 0 [2021-11-03 05:14:00,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:14:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-03 05:14:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-03 05:14:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-03 05:14:00,963 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 278 [2021-11-03 05:14:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:00,963 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-03 05:14:00,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:00,964 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-03 05:14:00,964 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-03 05:14:00,966 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:14:01,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:01,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-03 05:14:01,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-03 05:14:01,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:01,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:01,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:01,786 INFO L857 garLoopResultBuilder]: For program point L301(lines 301 423) no Hoare annotation was computed. [2021-11-03 05:14:01,787 INFO L857 garLoopResultBuilder]: For program point L235(lines 235 423) no Hoare annotation was computed. [2021-11-03 05:14:01,787 INFO L857 garLoopResultBuilder]: For program point L169(lines 169 423) no Hoare annotation was computed. [2021-11-03 05:14:01,787 INFO L857 garLoopResultBuilder]: For program point L303(lines 303 423) no Hoare annotation was computed. [2021-11-03 05:14:01,787 INFO L857 garLoopResultBuilder]: For program point L105(lines 105 423) no Hoare annotation was computed. [2021-11-03 05:14:01,787 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 423) no Hoare annotation was computed. [2021-11-03 05:14:01,787 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 423) no Hoare annotation was computed. [2021-11-03 05:14:01,787 INFO L857 garLoopResultBuilder]: For program point L307(lines 307 423) no Hoare annotation was computed. [2021-11-03 05:14:01,787 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 423) no Hoare annotation was computed. [2021-11-03 05:14:01,787 INFO L857 garLoopResultBuilder]: For program point L109(lines 109 423) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L242(lines 242 423) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 423) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L244(lines 244 423) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L179(lines 179 423) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L378(lines 378 423) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L48(lines 48 423) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L445-1(lines 39 608) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L247(lines 247 423) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L116(lines 116 423) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L448-1(lines 39 608) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L52(lines 52 423) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L449(line 449) no Hoare annotation was computed. [2021-11-03 05:14:01,788 INFO L857 garLoopResultBuilder]: For program point L185(lines 185 423) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point L385(lines 385 423) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point L319(lines 319 423) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point L189(lines 189 423) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point L123(lines 123 423) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point L57(lines 57 423) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point L388(lines 388 423) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point L390(lines 390 423) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point L324(lines 324 423) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point L258(lines 258 423) no Hoare annotation was computed. [2021-11-03 05:14:01,789 INFO L857 garLoopResultBuilder]: For program point L60(lines 60 423) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point L195(lines 195 423) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 423) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 423) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point L263(lines 263 423) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point L197(lines 197 423) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 449) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 423) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point L133(lines 133 423) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point L399(lines 399 423) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point L201(lines 201 423) no Hoare annotation was computed. [2021-11-03 05:14:01,790 INFO L857 garLoopResultBuilder]: For program point L69(lines 69 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L269(lines 269 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L404(lines 404 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L338(lines 338 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L140(lines 140 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L208(lines 208 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L341(lines 341 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L408(lines 408 423) no Hoare annotation was computed. [2021-11-03 05:14:01,791 INFO L857 garLoopResultBuilder]: For program point L144(lines 144 423) no Hoare annotation was computed. [2021-11-03 05:14:01,792 INFO L853 garLoopResultBuilder]: At program point L607(lines 39 608) the Hoare annotation is: (let ((.cse8 (= ~a25~0 ~a11~0)) (.cse1 (= ~a17~0 8)) (.cse3 (= ~a21~0 1)) (.cse11 (<= ~a19~0 0)) (.cse9 (<= ~a11~0 0)) (.cse10 (<= ~a28~0 7)) (.cse7 (<= 9 ~a28~0)) (.cse6 (<= ~a17~0 8)) (.cse5 (= ~a19~0 1)) (.cse0 (<= 10 ~a28~0)) (.cse12 (<= ~a17~0 7)) (.cse4 (<= ~a28~0 10)) (.cse2 (= ~a25~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse1 (= 7 ~a28~0) (= ~a11~0 1) (not .cse5) .cse3) (and .cse0 .cse6 .cse4 .cse5) (and .cse1 .cse2 .cse3 .cse5) (and .cse1 .cse7 .cse3 .cse4 .cse5) (and .cse1 .cse8 .cse3 .cse9 .cse5 .cse10) (and .cse2 .cse6 .cse5 .cse10) (and .cse1 .cse3 .cse10 .cse11) (and .cse8 .cse7 .cse2 .cse12 .cse4) (and .cse1 .cse3 (= ~a28~0 8) (= ~a25~0 0) .cse11) (and .cse2 .cse9 .cse5 .cse10) (and .cse7 .cse2 .cse6 .cse4 .cse5) (and .cse0 .cse12 .cse4 (not .cse2)))) [2021-11-03 05:14:01,792 INFO L857 garLoopResultBuilder]: For program point L79(lines 79 423) no Hoare annotation was computed. [2021-11-03 05:14:01,792 INFO L857 garLoopResultBuilder]: For program point L212(lines 212 423) no Hoare annotation was computed. [2021-11-03 05:14:01,792 INFO L860 garLoopResultBuilder]: At program point L610(lines 610 627) the Hoare annotation is: true [2021-11-03 05:14:01,792 INFO L857 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-11-03 05:14:01,793 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 423) no Hoare annotation was computed. [2021-11-03 05:14:01,793 INFO L857 garLoopResultBuilder]: For program point L149(lines 149 423) no Hoare annotation was computed. [2021-11-03 05:14:01,793 INFO L857 garLoopResultBuilder]: For program point L414(lines 414 423) no Hoare annotation was computed. [2021-11-03 05:14:01,793 INFO L857 garLoopResultBuilder]: For program point L84(lines 84 423) no Hoare annotation was computed. [2021-11-03 05:14:01,793 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-03 05:14:01,793 INFO L857 garLoopResultBuilder]: For program point L417(lines 417 423) no Hoare annotation was computed. [2021-11-03 05:14:01,793 INFO L857 garLoopResultBuilder]: For program point L153(lines 153 423) no Hoare annotation was computed. [2021-11-03 05:14:01,794 INFO L853 garLoopResultBuilder]: At program point L616-2(lines 616 626) the Hoare annotation is: (let ((.cse8 (= ~a25~0 ~a11~0)) (.cse1 (= ~a17~0 8)) (.cse3 (= ~a21~0 1)) (.cse11 (<= ~a19~0 0)) (.cse9 (<= ~a11~0 0)) (.cse10 (<= ~a28~0 7)) (.cse7 (<= 9 ~a28~0)) (.cse6 (<= ~a17~0 8)) (.cse5 (= ~a19~0 1)) (.cse0 (<= 10 ~a28~0)) (.cse12 (<= ~a17~0 7)) (.cse4 (<= ~a28~0 10)) (.cse2 (= ~a25~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse1 (= 7 ~a28~0) (= ~a11~0 1) (not .cse5) .cse3) (and .cse0 .cse6 .cse4 .cse5) (and .cse1 .cse2 .cse3 .cse5) (and .cse1 .cse7 .cse3 .cse4 .cse5) (and .cse1 .cse8 .cse3 .cse9 .cse5 .cse10) (and .cse2 .cse6 .cse5 .cse10) (and .cse1 .cse3 .cse10 .cse11) (and .cse8 .cse7 .cse2 .cse12 .cse4) (and .cse1 .cse3 (= ~a28~0 8) (= ~a25~0 0) .cse11) (and .cse2 .cse9 .cse5 .cse10) (and .cse7 .cse2 .cse6 .cse4 .cse5) (and .cse0 .cse12 .cse4 (not .cse2)))) [2021-11-03 05:14:01,794 INFO L857 garLoopResultBuilder]: For program point L286(lines 286 423) no Hoare annotation was computed. [2021-11-03 05:14:01,794 INFO L857 garLoopResultBuilder]: For program point L419(lines 419 423) no Hoare annotation was computed. [2021-11-03 05:14:01,794 INFO L857 garLoopResultBuilder]: For program point L222(lines 222 423) no Hoare annotation was computed. [2021-11-03 05:14:01,794 INFO L857 garLoopResultBuilder]: For program point L290(lines 290 423) no Hoare annotation was computed. [2021-11-03 05:14:01,794 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 423) no Hoare annotation was computed. [2021-11-03 05:14:01,794 INFO L857 garLoopResultBuilder]: For program point L92(lines 92 423) no Hoare annotation was computed. [2021-11-03 05:14:01,794 INFO L857 garLoopResultBuilder]: For program point L621(line 621) no Hoare annotation was computed. [2021-11-03 05:14:01,795 INFO L857 garLoopResultBuilder]: For program point L225(lines 225 423) no Hoare annotation was computed. [2021-11-03 05:14:01,795 INFO L857 garLoopResultBuilder]: For program point L359(lines 359 423) no Hoare annotation was computed. [2021-11-03 05:14:01,795 INFO L857 garLoopResultBuilder]: For program point L293(lines 293 423) no Hoare annotation was computed. [2021-11-03 05:14:01,795 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 423) no Hoare annotation was computed. [2021-11-03 05:14:01,795 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 423) no Hoare annotation was computed. [2021-11-03 05:14:01,795 INFO L857 garLoopResultBuilder]: For program point L164(lines 164 423) no Hoare annotation was computed. [2021-11-03 05:14:01,796 INFO L857 garLoopResultBuilder]: For program point L364(lines 364 423) no Hoare annotation was computed. [2021-11-03 05:14:01,796 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 423) no Hoare annotation was computed. [2021-11-03 05:14:01,796 INFO L857 garLoopResultBuilder]: For program point L101(lines 101 423) no Hoare annotation was computed. [2021-11-03 05:14:01,799 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:14:01,800 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:14:01,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:14:01 BoogieIcfgContainer [2021-11-03 05:14:01,827 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:14:01,827 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:14:01,827 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:14:01,828 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:14:01,828 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:13:41" (3/4) ... [2021-11-03 05:14:01,831 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-03 05:14:01,857 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 114 nodes and edges [2021-11-03 05:14:01,859 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-11-03 05:14:01,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-03 05:14:01,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-03 05:14:01,986 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 05:14:01,986 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:14:01,988 INFO L168 Benchmark]: Toolchain (without parser) took 23085.55 ms. Allocated memory was 100.7 MB in the beginning and 264.2 MB in the end (delta: 163.6 MB). Free memory was 64.6 MB in the beginning and 173.6 MB in the end (delta: -109.0 MB). Peak memory consumption was 54.2 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:01,988 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 100.7 MB. Free memory was 72.4 MB in the beginning and 72.4 MB in the end (delta: 30.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:14:01,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 597.74 ms. Allocated memory is still 100.7 MB. Free memory was 64.3 MB in the beginning and 62.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:01,989 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.51 ms. Allocated memory is still 100.7 MB. Free memory was 62.0 MB in the beginning and 56.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:01,989 INFO L168 Benchmark]: Boogie Preprocessor took 75.68 ms. Allocated memory is still 100.7 MB. Free memory was 56.5 MB in the beginning and 52.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:01,990 INFO L168 Benchmark]: RCFGBuilder took 1999.00 ms. Allocated memory was 100.7 MB in the beginning and 138.4 MB in the end (delta: 37.7 MB). Free memory was 52.3 MB in the beginning and 75.5 MB in the end (delta: -23.1 MB). Peak memory consumption was 47.0 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:01,990 INFO L168 Benchmark]: TraceAbstraction took 20150.61 ms. Allocated memory was 138.4 MB in the beginning and 264.2 MB in the end (delta: 125.8 MB). Free memory was 75.5 MB in the beginning and 189.5 MB in the end (delta: -114.1 MB). Peak memory consumption was 141.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:01,991 INFO L168 Benchmark]: Witness Printer took 159.19 ms. Allocated memory is still 264.2 MB. Free memory was 189.5 MB in the beginning and 173.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:01,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 100.7 MB. Free memory was 72.4 MB in the beginning and 72.4 MB in the end (delta: 30.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 597.74 ms. Allocated memory is still 100.7 MB. Free memory was 64.3 MB in the beginning and 62.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 96.51 ms. Allocated memory is still 100.7 MB. Free memory was 62.0 MB in the beginning and 56.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.68 ms. Allocated memory is still 100.7 MB. Free memory was 56.5 MB in the beginning and 52.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1999.00 ms. Allocated memory was 100.7 MB in the beginning and 138.4 MB in the end (delta: 37.7 MB). Free memory was 52.3 MB in the beginning and 75.5 MB in the end (delta: -23.1 MB). Peak memory consumption was 47.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20150.61 ms. Allocated memory was 138.4 MB in the beginning and 264.2 MB in the end (delta: 125.8 MB). Free memory was 75.5 MB in the beginning and 189.5 MB in the end (delta: -114.1 MB). Peak memory consumption was 141.6 MB. Max. memory is 16.1 GB. * Witness Printer took 159.19 ms. Allocated memory is still 264.2 MB. Free memory was 189.5 MB in the beginning and 173.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 449]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 20.0s, OverallIterations: 16, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1314 SDtfs, 1048 SDslu, 110 SDs, 0 SdLazy, 4300 SolverSat, 681 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1758 GetRequests, 1717 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2163occurred in iteration=7, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 16 MinimizatonAttempts, 1200 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 37 NumberOfFragments, 393 HoareAnnotationTreeSize, 3 FomulaSimplifications, 892 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 196 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.9s InterpolantComputationTime, 3236 NumberOfCodeBlocks, 3236 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 4066 ConstructedInterpolants, 0 QuantifiedInterpolants, 18965 SizeOfPredicates, 7 NumberOfNonLiveVariables, 1580 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 24 InterpolantComputations, 20 PerfectInterpolantSequences, 3635/4118 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 616]: Loop Invariant Derived loop invariant: (((((((((((((((10 <= a28 && a17 == 8) && a25 == 1) && a21 == 1) && a28 <= 10) || ((((a17 == 8 && 7 == a28) && a11 == 1) && !(a19 == 1)) && a21 == 1)) || (((10 <= a28 && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((a17 == 8 && a25 == 1) && a21 == 1) && a19 == 1)) || ((((a17 == 8 && 9 <= a28) && a21 == 1) && a28 <= 10) && a19 == 1)) || (((((a17 == 8 && a25 == a11) && a21 == 1) && a11 <= 0) && a19 == 1) && a28 <= 7)) || (((a25 == 1 && a17 <= 8) && a19 == 1) && a28 <= 7)) || (((a17 == 8 && a21 == 1) && a28 <= 7) && a19 <= 0)) || ((((a25 == a11 && 9 <= a28) && a25 == 1) && a17 <= 7) && a28 <= 10)) || ((((a17 == 8 && a21 == 1) && a28 == 8) && a25 == 0) && a19 <= 0)) || (((a25 == 1 && a11 <= 0) && a19 == 1) && a28 <= 7)) || ((((9 <= a28 && a25 == 1) && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((10 <= a28 && a17 <= 7) && a28 <= 10) && !(a25 == 1)) - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((((((10 <= a28 && a17 == 8) && a25 == 1) && a21 == 1) && a28 <= 10) || ((((a17 == 8 && 7 == a28) && a11 == 1) && !(a19 == 1)) && a21 == 1)) || (((10 <= a28 && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((a17 == 8 && a25 == 1) && a21 == 1) && a19 == 1)) || ((((a17 == 8 && 9 <= a28) && a21 == 1) && a28 <= 10) && a19 == 1)) || (((((a17 == 8 && a25 == a11) && a21 == 1) && a11 <= 0) && a19 == 1) && a28 <= 7)) || (((a25 == 1 && a17 <= 8) && a19 == 1) && a28 <= 7)) || (((a17 == 8 && a21 == 1) && a28 <= 7) && a19 <= 0)) || ((((a25 == a11 && 9 <= a28) && a25 == 1) && a17 <= 7) && a28 <= 10)) || ((((a17 == 8 && a21 == 1) && a28 == 8) && a25 == 0) && a19 <= 0)) || (((a25 == 1 && a11 <= 0) && a19 == 1) && a28 <= 7)) || ((((9 <= a28 && a25 == 1) && a17 <= 8) && a28 <= 10) && a19 == 1)) || (((10 <= a28 && a17 <= 7) && a28 <= 10) && !(a25 == 1)) RESULT: Ultimate proved your program to be correct! [2021-11-03 05:14:02,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef738d8f-d706-4094-9d64-ac0c58ab618b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE