./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.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_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/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_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/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_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/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 34327c45f5bb67454914f640ebf6bf1380406f6d81b1c1440537dbf8cffc8ffd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:36:41,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:36:41,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:36:41,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:36:41,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:36:41,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:36:41,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:36:41,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:36:41,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:36:41,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:36:41,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:36:41,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:36:41,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:36:41,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:36:41,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:36:41,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:36:41,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:36:41,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:36:41,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:36:41,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:36:41,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:36:41,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:36:41,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:36:41,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:36:41,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:36:41,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:36:41,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:36:41,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:36:41,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:36:41,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:36:41,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:36:41,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:36:41,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:36:41,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:36:41,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:36:41,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:36:41,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:36:41,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:36:41,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:36:41,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:36:41,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:36:41,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:36:41,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:36:41,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:36:41,671 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:36:41,672 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:36:41,672 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:36:41,672 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:36:41,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:36:41,673 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:36:41,674 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:36:41,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:36:41,674 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:36:41,675 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:36:41,675 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:36:41,676 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:36:41,676 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:36:41,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:36:41,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:36:41,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:36:41,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:36:41,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:36:41,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:36:41,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:36:41,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:36:41,680 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:36:41,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:36:41,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:36:41,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:36:41,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:36:41,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:36:41,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:36:41,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:36:41,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:36:41,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:36:41,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:36:41,685 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:36:41,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:36:41,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:36:41,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:36:41,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:36:41,686 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_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34327c45f5bb67454914f640ebf6bf1380406f6d81b1c1440537dbf8cffc8ffd [2021-11-07 01:36:41,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:36:42,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:36:42,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:36:42,040 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:36:42,041 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:36:42,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2021-11-07 01:36:42,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/data/2ca4104e4/0f0b22fcde134b9284d51c0f1f98db2c/FLAG956ca6ab1 [2021-11-07 01:36:43,016 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:36:43,017 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2021-11-07 01:36:43,042 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/data/2ca4104e4/0f0b22fcde134b9284d51c0f1f98db2c/FLAG956ca6ab1 [2021-11-07 01:36:43,165 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/data/2ca4104e4/0f0b22fcde134b9284d51c0f1f98db2c [2021-11-07 01:36:43,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:36:43,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:36:43,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:43,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:36:43,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:36:43,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:43" (1/1) ... [2021-11-07 01:36:43,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7ddefd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:43, skipping insertion in model container [2021-11-07 01:36:43,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:43" (1/1) ... [2021-11-07 01:36:43,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:36:43,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:36:43,841 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_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c[65471,65484] [2021-11-07 01:36:43,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:36:43,865 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:36:44,054 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_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c[65471,65484] [2021-11-07 01:36:44,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:36:44,075 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:36:44,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44 WrapperNode [2021-11-07 01:36:44,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:44,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:36:44,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:36:44,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:36:44,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (1/1) ... [2021-11-07 01:36:44,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (1/1) ... [2021-11-07 01:36:44,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:36:44,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:36:44,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:36:44,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:36:44,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (1/1) ... [2021-11-07 01:36:44,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (1/1) ... [2021-11-07 01:36:44,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (1/1) ... [2021-11-07 01:36:44,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (1/1) ... [2021-11-07 01:36:44,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (1/1) ... [2021-11-07 01:36:44,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (1/1) ... [2021-11-07 01:36:44,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (1/1) ... [2021-11-07 01:36:44,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:36:44,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:36:44,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:36:44,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:36:44,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (1/1) ... [2021-11-07 01:36:44,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:36:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:36:44,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:36:44,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:36:44,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:36:44,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:36:44,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:36:44,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:36:54,813 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:36:54,813 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-11-07 01:36:54,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:54 BoogieIcfgContainer [2021-11-07 01:36:54,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:36:54,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:36:54,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:36:54,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:36:54,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:36:43" (1/3) ... [2021-11-07 01:36:54,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668d2592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:54, skipping insertion in model container [2021-11-07 01:36:54,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:44" (2/3) ... [2021-11-07 01:36:54,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668d2592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:54, skipping insertion in model container [2021-11-07 01:36:54,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:54" (3/3) ... [2021-11-07 01:36:54,836 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2021-11-07 01:36:54,843 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:36:54,843 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:36:54,921 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:36:54,929 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 01:36:54,930 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:36:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 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 01:36:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 01:36:55,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:55,018 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:55,018 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:36:55,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:55,025 INFO L85 PathProgramCache]: Analyzing trace with hash -302462875, now seen corresponding path program 1 times [2021-11-07 01:36:55,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:36:55,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362566079] [2021-11-07 01:36:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:55,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:36:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:57,561 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 01:36:57,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:36:57,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362566079] [2021-11-07 01:36:57,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362566079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:57,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:57,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:36:57,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875832068] [2021-11-07 01:36:57,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:57,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:36:57,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:57,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:57,595 INFO L87 Difference]: Start difference. First operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 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 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 01:36:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:57,895 INFO L93 Difference]: Finished difference Result 483 states and 822 transitions. [2021-11-07 01:36:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:57,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-07 01:36:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:57,923 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:36:57,925 INFO L226 Difference]: Without dead ends: 460 [2021-11-07 01:36:57,930 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 01:36:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-07 01:36:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2021-11-07 01:36:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.712694877505568) internal successors, (769), 449 states have internal predecessors, (769), 0 states have call successors, (0), 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 01:36:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 769 transitions. [2021-11-07 01:36:58,032 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 769 transitions. Word has length 126 [2021-11-07 01:36:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:58,034 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 769 transitions. [2021-11-07 01:36:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 01:36:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 769 transitions. [2021-11-07 01:36:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 01:36:58,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:58,048 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:58,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:36:58,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:36:58,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:58,052 INFO L85 PathProgramCache]: Analyzing trace with hash -860128157, now seen corresponding path program 1 times [2021-11-07 01:36:58,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:36:58,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963989634] [2021-11-07 01:36:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:58,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:36:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:59,339 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 01:36:59,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:36:59,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963989634] [2021-11-07 01:36:59,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963989634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:59,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:59,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:36:59,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682559415] [2021-11-07 01:36:59,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:59,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:36:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:59,344 INFO L87 Difference]: Start difference. First operand 450 states and 769 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 01:36:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:59,477 INFO L93 Difference]: Finished difference Result 483 states and 819 transitions. [2021-11-07 01:36:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:59,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-07 01:36:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:59,482 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:36:59,482 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:36:59,484 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 01:36:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:36:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-07 01:36:59,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.710467706013363) internal successors, (768), 449 states have internal predecessors, (768), 0 states have call successors, (0), 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 01:36:59,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 768 transitions. [2021-11-07 01:36:59,500 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 768 transitions. Word has length 127 [2021-11-07 01:36:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:59,501 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 768 transitions. [2021-11-07 01:36:59,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 01:36:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 768 transitions. [2021-11-07 01:36:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 01:36:59,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:59,504 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:59,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:36:59,505 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:36:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:59,506 INFO L85 PathProgramCache]: Analyzing trace with hash -962430962, now seen corresponding path program 1 times [2021-11-07 01:36:59,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:36:59,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629460807] [2021-11-07 01:36:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:59,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:00,698 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 01:37:00,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:00,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629460807] [2021-11-07 01:37:00,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629460807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:00,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:00,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:00,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114585021] [2021-11-07 01:37:00,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:00,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:00,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:00,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:00,710 INFO L87 Difference]: Start difference. First operand 450 states and 768 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 01:37:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:00,840 INFO L93 Difference]: Finished difference Result 483 states and 818 transitions. [2021-11-07 01:37:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-11-07 01:37:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:00,846 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:37:00,846 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:37:00,847 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 01:37:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:37:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-07 01:37:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7082405345211582) internal successors, (767), 449 states have internal predecessors, (767), 0 states have call successors, (0), 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 01:37:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 767 transitions. [2021-11-07 01:37:00,864 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 767 transitions. Word has length 128 [2021-11-07 01:37:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:00,866 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 767 transitions. [2021-11-07 01:37:00,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 01:37:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 767 transitions. [2021-11-07 01:37:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 01:37:00,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:00,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:00,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:37:00,870 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:00,870 INFO L85 PathProgramCache]: Analyzing trace with hash 166601132, now seen corresponding path program 1 times [2021-11-07 01:37:00,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:00,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559595808] [2021-11-07 01:37:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:00,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:01,941 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 01:37:01,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:01,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559595808] [2021-11-07 01:37:01,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559595808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:01,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:01,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:01,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022401490] [2021-11-07 01:37:01,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:01,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:01,949 INFO L87 Difference]: Start difference. First operand 450 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 01:37:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:02,084 INFO L93 Difference]: Finished difference Result 483 states and 817 transitions. [2021-11-07 01:37:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:02,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-11-07 01:37:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:02,088 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:37:02,088 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:37:02,089 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 01:37:02,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:37:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-07 01:37:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7060133630289531) internal successors, (766), 449 states have internal predecessors, (766), 0 states have call successors, (0), 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 01:37:02,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 766 transitions. [2021-11-07 01:37:02,108 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 766 transitions. Word has length 129 [2021-11-07 01:37:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:02,108 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 766 transitions. [2021-11-07 01:37:02,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 01:37:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 766 transitions. [2021-11-07 01:37:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 01:37:02,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:02,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:02,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:37:02,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:02,117 INFO L85 PathProgramCache]: Analyzing trace with hash 812309431, now seen corresponding path program 1 times [2021-11-07 01:37:02,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:02,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108134206] [2021-11-07 01:37:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:02,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:03,247 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 01:37:03,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:03,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108134206] [2021-11-07 01:37:03,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108134206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:03,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:03,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 01:37:03,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050145943] [2021-11-07 01:37:03,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:03,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:03,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:03,251 INFO L87 Difference]: Start difference. First operand 450 states and 766 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 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 01:37:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:03,462 INFO L93 Difference]: Finished difference Result 489 states and 822 transitions. [2021-11-07 01:37:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:03,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-11-07 01:37:03,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:03,467 INFO L225 Difference]: With dead ends: 489 [2021-11-07 01:37:03,467 INFO L226 Difference]: Without dead ends: 468 [2021-11-07 01:37:03,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:37:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-07 01:37:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 450. [2021-11-07 01:37:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7037861915367483) internal successors, (765), 449 states have internal predecessors, (765), 0 states have call successors, (0), 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 01:37:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 765 transitions. [2021-11-07 01:37:03,484 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 765 transitions. Word has length 130 [2021-11-07 01:37:03,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:03,485 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 765 transitions. [2021-11-07 01:37:03,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 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 01:37:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 765 transitions. [2021-11-07 01:37:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:37:03,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:03,488 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:03,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:37:03,489 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:03,489 INFO L85 PathProgramCache]: Analyzing trace with hash -640118027, now seen corresponding path program 1 times [2021-11-07 01:37:03,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:03,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104583440] [2021-11-07 01:37:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:03,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:04,436 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 01:37:04,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:04,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104583440] [2021-11-07 01:37:04,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104583440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:04,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:04,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:04,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223791121] [2021-11-07 01:37:04,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:04,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:04,445 INFO L87 Difference]: Start difference. First operand 450 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 01:37:04,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:04,579 INFO L93 Difference]: Finished difference Result 483 states and 815 transitions. [2021-11-07 01:37:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:04,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-07 01:37:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:04,583 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:37:04,583 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:37:04,584 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 01:37:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:37:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-07 01:37:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 0 states have call successors, (0), 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 01:37:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2021-11-07 01:37:04,602 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 131 [2021-11-07 01:37:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:04,603 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2021-11-07 01:37:04,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 01:37:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2021-11-07 01:37:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 01:37:04,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:04,606 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:04,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:37:04,607 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:04,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:04,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1842699357, now seen corresponding path program 1 times [2021-11-07 01:37:04,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:04,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118555972] [2021-11-07 01:37:04,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:04,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:05,512 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 01:37:05,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:05,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118555972] [2021-11-07 01:37:05,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118555972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:05,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:05,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:05,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888828421] [2021-11-07 01:37:05,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:05,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:05,516 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 01:37:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:05,668 INFO L93 Difference]: Finished difference Result 481 states and 811 transitions. [2021-11-07 01:37:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-07 01:37:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:05,673 INFO L225 Difference]: With dead ends: 481 [2021-11-07 01:37:05,673 INFO L226 Difference]: Without dead ends: 460 [2021-11-07 01:37:05,674 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 01:37:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-07 01:37:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2021-11-07 01:37:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.7) internal successors, (765), 450 states have internal predecessors, (765), 0 states have call successors, (0), 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 01:37:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 765 transitions. [2021-11-07 01:37:05,688 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 765 transitions. Word has length 133 [2021-11-07 01:37:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:05,689 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 765 transitions. [2021-11-07 01:37:05,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 01:37:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 765 transitions. [2021-11-07 01:37:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:37:05,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:05,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:05,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:37:05,692 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:05,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1201002542, now seen corresponding path program 1 times [2021-11-07 01:37:05,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:05,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174074555] [2021-11-07 01:37:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:05,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:06,476 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 01:37:06,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:06,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174074555] [2021-11-07 01:37:06,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174074555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:06,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:06,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:06,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073244415] [2021-11-07 01:37:06,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:06,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:06,479 INFO L87 Difference]: Start difference. First operand 451 states and 765 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 01:37:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:06,605 INFO L93 Difference]: Finished difference Result 482 states and 812 transitions. [2021-11-07 01:37:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:06,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-07 01:37:06,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:06,610 INFO L225 Difference]: With dead ends: 482 [2021-11-07 01:37:06,610 INFO L226 Difference]: Without dead ends: 461 [2021-11-07 01:37:06,610 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 01:37:06,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-07 01:37:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2021-11-07 01:37:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 0 states have call successors, (0), 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 01:37:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2021-11-07 01:37:06,626 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 134 [2021-11-07 01:37:06,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:06,626 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2021-11-07 01:37:06,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 01:37:06,627 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2021-11-07 01:37:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 01:37:06,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:06,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:06,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:37:06,630 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash 325408148, now seen corresponding path program 1 times [2021-11-07 01:37:06,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:06,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273651152] [2021-11-07 01:37:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:06,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:07,515 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 01:37:07,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:07,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273651152] [2021-11-07 01:37:07,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273651152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:07,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:07,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:37:07,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481640310] [2021-11-07 01:37:07,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:07,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:07,521 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 01:37:07,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:07,680 INFO L93 Difference]: Finished difference Result 482 states and 809 transitions. [2021-11-07 01:37:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:07,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-11-07 01:37:07,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:07,684 INFO L225 Difference]: With dead ends: 482 [2021-11-07 01:37:07,684 INFO L226 Difference]: Without dead ends: 461 [2021-11-07 01:37:07,685 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 01:37:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-07 01:37:07,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 454. [2021-11-07 01:37:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6931567328918322) internal successors, (767), 453 states have internal predecessors, (767), 0 states have call successors, (0), 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 01:37:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 767 transitions. [2021-11-07 01:37:07,702 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 767 transitions. Word has length 136 [2021-11-07 01:37:07,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:07,703 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 767 transitions. [2021-11-07 01:37:07,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 01:37:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 767 transitions. [2021-11-07 01:37:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:37:07,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:07,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:07,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:37:07,706 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1499107483, now seen corresponding path program 1 times [2021-11-07 01:37:07,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:07,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600752389] [2021-11-07 01:37:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:07,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:07,962 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 01:37:07,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:07,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600752389] [2021-11-07 01:37:07,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600752389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:07,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:07,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 01:37:07,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166999968] [2021-11-07 01:37:07,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:07,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:37:07,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:07,965 INFO L87 Difference]: Start difference. First operand 454 states and 767 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 01:37:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:08,224 INFO L93 Difference]: Finished difference Result 505 states and 847 transitions. [2021-11-07 01:37:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:37:08,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2021-11-07 01:37:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:08,228 INFO L225 Difference]: With dead ends: 505 [2021-11-07 01:37:08,228 INFO L226 Difference]: Without dead ends: 484 [2021-11-07 01:37:08,228 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 01:37:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-07 01:37:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457. [2021-11-07 01:37:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.6864035087719298) internal successors, (769), 456 states have internal predecessors, (769), 0 states have call successors, (0), 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 01:37:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 769 transitions. [2021-11-07 01:37:08,248 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 769 transitions. Word has length 137 [2021-11-07 01:37:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:08,249 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 769 transitions. [2021-11-07 01:37:08,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 01:37:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 769 transitions. [2021-11-07 01:37:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 01:37:08,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:08,251 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:08,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:37:08,252 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:08,253 INFO L85 PathProgramCache]: Analyzing trace with hash 924697408, now seen corresponding path program 1 times [2021-11-07 01:37:08,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:37:08,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329322975] [2021-11-07 01:37:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:08,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:37:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:11,386 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 01:37:11,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:37:11,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329322975] [2021-11-07 01:37:11,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329322975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:37:11,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251675269] [2021-11-07 01:37:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:11,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:37:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:11,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:37:11,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c84d35f-395c-4702-8d4b-43ce2f9b6a2c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:37:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:37:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:30,943 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 01:41:30,943 INFO L328 TraceCheckSpWp]: Computing backward predicates...