./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8 --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 ed935744e0b15a55a11878fa4d21c1a0b8f1c4098e81aa4afd54cd8910ee834a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:23:31,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:23:31,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:23:31,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:23:31,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:23:31,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:23:31,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:23:31,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:23:31,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:23:31,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:23:31,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:23:31,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:23:31,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:23:31,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:23:31,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:23:31,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:23:31,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:23:31,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:23:31,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:23:31,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:23:31,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:23:31,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:23:31,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:23:31,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:23:31,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:23:31,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:23:31,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:23:31,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:23:31,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:23:31,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:23:31,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:23:31,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:23:31,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:23:31,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:23:31,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:23:31,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:23:31,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:23:31,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:23:31,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:23:31,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:23:31,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:23:31,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:23:31,709 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:23:31,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:23:31,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:23:31,712 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:23:31,712 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:23:31,712 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:23:31,713 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:23:31,713 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:23:31,720 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:23:31,721 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:23:31,722 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:23:31,722 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:23:31,723 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:23:31,723 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:23:31,723 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:23:31,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:23:31,725 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:23:31,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:23:31,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:23:31,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:23:31,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:23:31,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:23:31,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:23:31,727 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:23:31,727 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:23:31,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:23:31,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:23:31,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:23:31,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:23:31,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:23:31,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:23:31,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:23:31,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:23:31,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:23:31,732 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:23:31,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:23:31,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:23:31,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:23:31,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:23:31,733 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_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed935744e0b15a55a11878fa4d21c1a0b8f1c4098e81aa4afd54cd8910ee834a [2021-11-07 02:23:32,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:23:32,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:23:32,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:23:32,072 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:23:32,077 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:23:32,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2021-11-07 02:23:32,205 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/data/7fb7cd417/8836c88a43d4460faecd98349fbda50d/FLAG3270c20a1 [2021-11-07 02:23:32,891 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:23:32,894 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2021-11-07 02:23:32,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/data/7fb7cd417/8836c88a43d4460faecd98349fbda50d/FLAG3270c20a1 [2021-11-07 02:23:33,085 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/data/7fb7cd417/8836c88a43d4460faecd98349fbda50d [2021-11-07 02:23:33,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:23:33,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:23:33,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:33,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:23:33,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:23:33,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2244b6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33, skipping insertion in model container [2021-11-07 02:23:33,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:23:33,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:23:33,545 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_ea72a4d5-57ca-409e-b671-3c6c13576adc/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c[26792,26805] [2021-11-07 02:23:33,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:33,589 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:23:33,742 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_ea72a4d5-57ca-409e-b671-3c6c13576adc/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c[26792,26805] [2021-11-07 02:23:33,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:33,762 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:23:33,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33 WrapperNode [2021-11-07 02:23:33,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:33,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:23:33,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:23:33,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:23:33,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:23:33,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:23:33,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:23:33,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:23:33,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:23:33,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:23:33,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:23:33,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:23:33,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:23:33,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:23:34,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:23:34,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:23:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:23:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:23:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:23:34,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:23:39,091 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:23:39,091 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-11-07 02:23:39,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:23:39 BoogieIcfgContainer [2021-11-07 02:23:39,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:23:39,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:23:39,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:23:39,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:23:39,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:23:33" (1/3) ... [2021-11-07 02:23:39,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576be6f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:23:39, skipping insertion in model container [2021-11-07 02:23:39,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33" (2/3) ... [2021-11-07 02:23:39,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576be6f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:23:39, skipping insertion in model container [2021-11-07 02:23:39,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:23:39" (3/3) ... [2021-11-07 02:23:39,109 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2021-11-07 02:23:39,116 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:23:39,116 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:23:39,166 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:23:39,174 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 [2021-11-07 02:23:39,174 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:23:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 139 states, 137 states have (on average 1.6277372262773722) internal successors, (223), 138 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:23:39,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:39,209 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] [2021-11-07 02:23:39,209 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash 983402015, now seen corresponding path program 1 times [2021-11-07 02:23:39,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:23:39,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441468553] [2021-11-07 02:23:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:39,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:23:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:40,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:23:40,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441468553] [2021-11-07 02:23:40,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441468553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:40,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:40,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:23:40,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134214820] [2021-11-07 02:23:40,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:40,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:23:40,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:40,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:40,853 INFO L87 Difference]: Start difference. First operand has 139 states, 137 states have (on average 1.6277372262773722) internal successors, (223), 138 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:41,088 INFO L93 Difference]: Finished difference Result 174 states and 285 transitions. [2021-11-07 02:23:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-07 02:23:41,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:41,104 INFO L225 Difference]: With dead ends: 174 [2021-11-07 02:23:41,104 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 02:23:41,107 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 [2021-11-07 02:23:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 02:23:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2021-11-07 02:23:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.6164383561643836) internal successors, (236), 146 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 236 transitions. [2021-11-07 02:23:41,165 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 236 transitions. Word has length 54 [2021-11-07 02:23:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:41,167 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 236 transitions. [2021-11-07 02:23:41,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 236 transitions. [2021-11-07 02:23:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:23:41,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:41,171 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] [2021-11-07 02:23:41,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:23:41,171 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash 352545484, now seen corresponding path program 1 times [2021-11-07 02:23:41,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:23:41,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388762554] [2021-11-07 02:23:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:41,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:23:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:41,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:23:41,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388762554] [2021-11-07 02:23:41,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388762554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:41,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:41,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:23:41,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104961941] [2021-11-07 02:23:41,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:41,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:23:41,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:41,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:41,992 INFO L87 Difference]: Start difference. First operand 147 states and 236 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:42,119 INFO L93 Difference]: Finished difference Result 177 states and 282 transitions. [2021-11-07 02:23:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:42,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-07 02:23:42,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:42,124 INFO L225 Difference]: With dead ends: 177 [2021-11-07 02:23:42,124 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 02:23:42,125 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 [2021-11-07 02:23:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 02:23:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2021-11-07 02:23:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.6095890410958904) internal successors, (235), 146 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 235 transitions. [2021-11-07 02:23:42,142 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 235 transitions. Word has length 55 [2021-11-07 02:23:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:42,143 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 235 transitions. [2021-11-07 02:23:42,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 235 transitions. [2021-11-07 02:23:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:23:42,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:42,160 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] [2021-11-07 02:23:42,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:23:42,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2018686040, now seen corresponding path program 1 times [2021-11-07 02:23:42,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:23:42,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133308401] [2021-11-07 02:23:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:42,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:23:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:42,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:23:42,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133308401] [2021-11-07 02:23:42,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133308401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:42,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:42,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:23:43,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452576227] [2021-11-07 02:23:43,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:43,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:23:43,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:43,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:43,004 INFO L87 Difference]: Start difference. First operand 147 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:43,175 INFO L93 Difference]: Finished difference Result 177 states and 281 transitions. [2021-11-07 02:23:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-07 02:23:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:43,179 INFO L225 Difference]: With dead ends: 177 [2021-11-07 02:23:43,179 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 02:23:43,180 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 [2021-11-07 02:23:43,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 02:23:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2021-11-07 02:23:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.6027397260273972) internal successors, (234), 146 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 234 transitions. [2021-11-07 02:23:43,203 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 234 transitions. Word has length 56 [2021-11-07 02:23:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:43,204 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 234 transitions. [2021-11-07 02:23:43,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 234 transitions. [2021-11-07 02:23:43,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:23:43,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:43,215 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] [2021-11-07 02:23:43,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 02:23:43,216 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:43,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1787999797, now seen corresponding path program 1 times [2021-11-07 02:23:43,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:23:43,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565861986] [2021-11-07 02:23:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:43,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:23:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:43,758 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:23:43,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565861986] [2021-11-07 02:23:43,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565861986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:43,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:43,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:23:43,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773945465] [2021-11-07 02:23:43,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:43,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:23:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:43,762 INFO L87 Difference]: Start difference. First operand 147 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:43,907 INFO L93 Difference]: Finished difference Result 177 states and 280 transitions. [2021-11-07 02:23:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-07 02:23:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:43,910 INFO L225 Difference]: With dead ends: 177 [2021-11-07 02:23:43,910 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 02:23:43,911 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 [2021-11-07 02:23:43,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 02:23:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2021-11-07 02:23:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.595890410958904) internal successors, (233), 146 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 233 transitions. [2021-11-07 02:23:43,924 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 233 transitions. Word has length 57 [2021-11-07 02:23:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:43,925 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 233 transitions. [2021-11-07 02:23:43,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 233 transitions. [2021-11-07 02:23:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:23:43,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:43,928 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] [2021-11-07 02:23:43,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 02:23:43,928 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash -458371791, now seen corresponding path program 1 times [2021-11-07 02:23:43,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:23:43,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838552244] [2021-11-07 02:23:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:43,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:23:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:44,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:23:44,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838552244] [2021-11-07 02:23:44,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838552244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:44,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:44,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:23:44,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133004282] [2021-11-07 02:23:44,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:44,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:23:44,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:44,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:44,471 INFO L87 Difference]: Start difference. First operand 147 states and 233 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:44,597 INFO L93 Difference]: Finished difference Result 177 states and 279 transitions. [2021-11-07 02:23:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:44,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:23:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:44,599 INFO L225 Difference]: With dead ends: 177 [2021-11-07 02:23:44,600 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 02:23:44,600 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 [2021-11-07 02:23:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 02:23:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2021-11-07 02:23:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.5890410958904109) internal successors, (232), 146 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 232 transitions. [2021-11-07 02:23:44,623 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 232 transitions. Word has length 58 [2021-11-07 02:23:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:44,624 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 232 transitions. [2021-11-07 02:23:44,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 232 transitions. [2021-11-07 02:23:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:23:44,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:44,626 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] [2021-11-07 02:23:44,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 02:23:44,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:44,628 INFO L85 PathProgramCache]: Analyzing trace with hash 410883801, now seen corresponding path program 1 times [2021-11-07 02:23:44,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:23:44,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038433668] [2021-11-07 02:23:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:44,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:23:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:45,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:23:45,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038433668] [2021-11-07 02:23:45,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038433668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:45,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:45,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:23:45,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213041254] [2021-11-07 02:23:45,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:45,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:23:45,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:45,105 INFO L87 Difference]: Start difference. First operand 147 states and 232 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:45,218 INFO L93 Difference]: Finished difference Result 175 states and 275 transitions. [2021-11-07 02:23:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:45,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-07 02:23:45,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:45,221 INFO L225 Difference]: With dead ends: 175 [2021-11-07 02:23:45,221 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 02:23:45,221 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 [2021-11-07 02:23:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 02:23:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2021-11-07 02:23:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2021-11-07 02:23:45,228 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 60 [2021-11-07 02:23:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:45,229 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2021-11-07 02:23:45,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2021-11-07 02:23:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:23:45,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:45,231 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] [2021-11-07 02:23:45,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 02:23:45,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:45,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash -235490772, now seen corresponding path program 1 times [2021-11-07 02:23:45,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:23:45,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963430075] [2021-11-07 02:23:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:45,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:23:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:45,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:23:45,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963430075] [2021-11-07 02:23:45,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963430075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:45,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:45,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:23:45,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376238087] [2021-11-07 02:23:45,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:45,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:23:45,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:45,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:45,857 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:45,962 INFO L93 Difference]: Finished difference Result 176 states and 276 transitions. [2021-11-07 02:23:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:45,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-07 02:23:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:45,964 INFO L225 Difference]: With dead ends: 176 [2021-11-07 02:23:45,964 INFO L226 Difference]: Without dead ends: 157 [2021-11-07 02:23:45,965 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 [2021-11-07 02:23:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-07 02:23:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2021-11-07 02:23:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.570469798657718) internal successors, (234), 149 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 234 transitions. [2021-11-07 02:23:45,973 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 234 transitions. Word has length 61 [2021-11-07 02:23:45,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:45,974 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 234 transitions. [2021-11-07 02:23:45,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,974 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 234 transitions. [2021-11-07 02:23:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:23:45,975 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:45,975 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] [2021-11-07 02:23:45,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 02:23:45,977 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:45,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1456453806, now seen corresponding path program 1 times [2021-11-07 02:23:45,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:23:45,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027599896] [2021-11-07 02:23:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:45,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:23:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:46,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:23:46,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027599896] [2021-11-07 02:23:46,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027599896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:46,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:46,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:23:46,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166423198] [2021-11-07 02:23:46,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:46,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:23:46,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:46,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:46,546 INFO L87 Difference]: Start difference. First operand 150 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:46,668 INFO L93 Difference]: Finished difference Result 176 states and 273 transitions. [2021-11-07 02:23:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-07 02:23:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:46,670 INFO L225 Difference]: With dead ends: 176 [2021-11-07 02:23:46,670 INFO L226 Difference]: Without dead ends: 157 [2021-11-07 02:23:46,671 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 [2021-11-07 02:23:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-07 02:23:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2021-11-07 02:23:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2021-11-07 02:23:46,679 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 63 [2021-11-07 02:23:46,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:46,680 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2021-11-07 02:23:46,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2021-11-07 02:23:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:23:46,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:46,681 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] [2021-11-07 02:23:46,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 02:23:46,682 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:46,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:46,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2083774036, now seen corresponding path program 1 times [2021-11-07 02:23:46,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:23:46,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511152655] [2021-11-07 02:23:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:46,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:23:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:46,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:23:46,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511152655] [2021-11-07 02:23:46,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511152655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:46,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:46,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 02:23:46,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869503152] [2021-11-07 02:23:46,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:23:46,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:23:46,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:23:46,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:23:46,876 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:47,104 INFO L93 Difference]: Finished difference Result 197 states and 308 transitions. [2021-11-07 02:23:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:23:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 02:23:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:47,106 INFO L225 Difference]: With dead ends: 197 [2021-11-07 02:23:47,106 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 02:23:47,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 02:23:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2021-11-07 02:23:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.5490196078431373) internal successors, (237), 153 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 237 transitions. [2021-11-07 02:23:47,121 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 237 transitions. Word has length 64 [2021-11-07 02:23:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:47,125 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 237 transitions. [2021-11-07 02:23:47,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 237 transitions. [2021-11-07 02:23:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:23:47,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:47,133 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:47,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 02:23:47,134 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2037671031, now seen corresponding path program 1 times [2021-11-07 02:23:47,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:23:47,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869140535] [2021-11-07 02:23:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:47,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:23:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:55,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:23:55,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869140535] [2021-11-07 02:23:55,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869140535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:23:55,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427436667] [2021-11-07 02:23:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:55,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:23:55,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:23:55,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:23:55,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea72a4d5-57ca-409e-b671-3c6c13576adc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:23:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:55,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 02:23:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:14,160 INFO L328 TraceCheckSpWp]: Computing backward predicates...