./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label36.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label36.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl --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 e5aa96fbac0e92c80f1f80982b7986fb62416e04af83c742e32bbaeb89f3bf9f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:19:26,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:19:26,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:19:26,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:19:26,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:19:26,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:19:26,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:19:26,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:19:26,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:19:26,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:19:26,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:19:26,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:19:26,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:19:26,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:19:26,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:19:26,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:19:26,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:19:26,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:19:26,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:19:26,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:19:26,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:19:26,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:19:26,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:19:26,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:19:26,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:19:26,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:19:26,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:19:26,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:19:26,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:19:26,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:19:26,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:19:26,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:19:26,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:19:26,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:19:26,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:19:26,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:19:26,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:19:26,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:19:26,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:19:26,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:19:26,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:19:26,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:19:26,769 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:19:26,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:19:26,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:19:26,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:19:26,777 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:19:26,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:19:26,778 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:19:26,778 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:19:26,778 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:19:26,779 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:19:26,780 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:19:26,780 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:19:26,780 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:19:26,780 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:19:26,780 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:19:26,781 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:19:26,781 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:19:26,781 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:19:26,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:19:26,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:19:26,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:19:26,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:19:26,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:19:26,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:19:26,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:19:26,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:19:26,784 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:19:26,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:19:26,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:19:26,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:19:26,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:19:26,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:19:26,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:19:26,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:19:26,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:19:26,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:19:26,787 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:19:26,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:19:26,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:19:26,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:19:26,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:19:26,787 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_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5aa96fbac0e92c80f1f80982b7986fb62416e04af83c742e32bbaeb89f3bf9f [2021-11-23 17:19:27,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:19:27,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:19:27,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:19:27,150 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:19:27,153 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:19:27,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label36.c [2021-11-23 17:19:27,224 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/data/c402eccb1/dd2581f33b7a48a2b5990b9dc9cd1609/FLAGc200ef95c [2021-11-23 17:19:28,110 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:19:28,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/sv-benchmarks/c/eca-rers2012/Problem13_label36.c [2021-11-23 17:19:28,147 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/data/c402eccb1/dd2581f33b7a48a2b5990b9dc9cd1609/FLAGc200ef95c [2021-11-23 17:19:28,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/data/c402eccb1/dd2581f33b7a48a2b5990b9dc9cd1609 [2021-11-23 17:19:28,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:19:28,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:19:28,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:19:28,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:19:28,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:19:28,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:19:28" (1/1) ... [2021-11-23 17:19:28,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205eea3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:28, skipping insertion in model container [2021-11-23 17:19:28,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:19:28" (1/1) ... [2021-11-23 17:19:28,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:19:28,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:19:29,027 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/sv-benchmarks/c/eca-rers2012/Problem13_label36.c[1933,1946] [2021-11-23 17:19:30,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:19:30,307 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:19:30,339 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/sv-benchmarks/c/eca-rers2012/Problem13_label36.c[1933,1946] [2021-11-23 17:19:31,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:19:31,151 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:19:31,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31 WrapperNode [2021-11-23 17:19:31,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:19:31,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:19:31,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:19:31,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:19:31,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31" (1/1) ... [2021-11-23 17:19:31,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31" (1/1) ... [2021-11-23 17:19:31,980 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-23 17:19:31,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:19:31,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:19:31,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:19:31,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:19:31,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31" (1/1) ... [2021-11-23 17:19:31,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31" (1/1) ... [2021-11-23 17:19:32,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31" (1/1) ... [2021-11-23 17:19:32,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31" (1/1) ... [2021-11-23 17:19:32,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31" (1/1) ... [2021-11-23 17:19:32,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31" (1/1) ... [2021-11-23 17:19:32,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31" (1/1) ... [2021-11-23 17:19:32,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:19:32,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:19:32,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:19:32,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:19:32,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:31" (1/1) ... [2021-11-23 17:19:32,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:19:32,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:19:32,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:19:32,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:19:32,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:19:32,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:19:32,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:19:32,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:19:33,030 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:19:33,032 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:19:38,833 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:19:38,895 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:19:38,901 INFO L158 Benchmark]: Toolchain (without parser) took 10320.43ms. Allocated memory was 104.9MB in the beginning and 681.6MB in the end (delta: 576.7MB). Free memory was 68.9MB in the beginning and 367.4MB in the end (delta: -298.5MB). Peak memory consumption was 291.8MB. Max. memory is 16.1GB. [2021-11-23 17:19:38,902 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 104.9MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:19:38,904 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2572.66ms. Allocated memory was 104.9MB in the beginning and 188.7MB in the end (delta: 83.9MB). Free memory was 68.9MB in the beginning and 114.9MB in the end (delta: -46.0MB). Peak memory consumption was 79.8MB. Max. memory is 16.1GB. [2021-11-23 17:19:38,906 INFO L158 Benchmark]: Boogie Procedure Inliner took 829.17ms. Allocated memory was 188.7MB in the beginning and 337.6MB in the end (delta: 148.9MB). Free memory was 114.9MB in the beginning and 198.8MB in the end (delta: -84.0MB). Peak memory consumption was 100.6MB. Max. memory is 16.1GB. [2021-11-23 17:19:38,907 INFO L158 Benchmark]: Boogie Preprocessor took 897.99ms. Allocated memory is still 337.6MB. Free memory was 198.8MB in the beginning and 181.7MB in the end (delta: 17.1MB). Peak memory consumption was 88.4MB. Max. memory is 16.1GB. [2021-11-23 17:19:38,908 INFO L158 Benchmark]: RCFGBuilder took 6016.34ms. Allocated memory was 337.6MB in the beginning and 681.6MB in the end (delta: 343.9MB). Free memory was 181.7MB in the beginning and 367.4MB in the end (delta: -185.6MB). Peak memory consumption was 172.0MB. Max. memory is 16.1GB. [2021-11-23 17:19:38,918 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 104.9MB. Free memory is still 79.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2572.66ms. Allocated memory was 104.9MB in the beginning and 188.7MB in the end (delta: 83.9MB). Free memory was 68.9MB in the beginning and 114.9MB in the end (delta: -46.0MB). Peak memory consumption was 79.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 829.17ms. Allocated memory was 188.7MB in the beginning and 337.6MB in the end (delta: 148.9MB). Free memory was 114.9MB in the beginning and 198.8MB in the end (delta: -84.0MB). Peak memory consumption was 100.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 897.99ms. Allocated memory is still 337.6MB. Free memory was 198.8MB in the beginning and 181.7MB in the end (delta: 17.1MB). Peak memory consumption was 88.4MB. Max. memory is 16.1GB. * RCFGBuilder took 6016.34ms. Allocated memory was 337.6MB in the beginning and 681.6MB in the end (delta: 343.9MB). Free memory was 181.7MB in the beginning and 367.4MB in the end (delta: -185.6MB). Peak memory consumption was 172.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:19:38,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label36.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl --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 e5aa96fbac0e92c80f1f80982b7986fb62416e04af83c742e32bbaeb89f3bf9f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:19:41,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:19:41,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:19:41,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:19:41,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:19:41,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:19:41,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:19:41,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:19:41,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:19:41,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:19:41,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:19:41,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:19:41,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:19:41,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:19:41,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:19:41,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:19:41,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:19:41,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:19:41,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:19:41,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:19:41,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:19:41,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:19:41,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:19:41,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:19:41,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:19:41,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:19:41,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:19:41,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:19:41,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:19:41,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:19:41,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:19:41,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:19:41,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:19:41,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:19:41,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:19:41,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:19:41,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:19:41,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:19:41,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:19:41,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:19:41,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:19:41,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:19:41,674 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:19:41,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:19:41,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:19:41,675 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:19:41,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:19:41,676 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:19:41,676 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:19:41,676 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:19:41,676 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:19:41,677 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:19:41,678 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:19:41,678 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:19:41,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:19:41,680 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:19:41,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:19:41,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:19:41,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:19:41,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:19:41,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:19:41,681 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:19:41,681 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:19:41,681 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:19:41,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:19:41,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:19:41,682 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:19:41,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:19:41,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:19:41,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:19:41,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:19:41,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:19:41,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:19:41,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:19:41,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:19:41,684 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:19:41,684 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:19:41,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:19:41,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:19:41,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:19:41,685 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5aa96fbac0e92c80f1f80982b7986fb62416e04af83c742e32bbaeb89f3bf9f [2021-11-23 17:19:42,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:19:42,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:19:42,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:19:42,116 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:19:42,116 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:19:42,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label36.c [2021-11-23 17:19:42,194 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/data/92342700d/049030454f8d4cb6a8a99ce36d38fa4f/FLAG4c05cb22a [2021-11-23 17:19:43,153 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:19:43,153 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/sv-benchmarks/c/eca-rers2012/Problem13_label36.c [2021-11-23 17:19:43,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/data/92342700d/049030454f8d4cb6a8a99ce36d38fa4f/FLAG4c05cb22a [2021-11-23 17:19:43,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/data/92342700d/049030454f8d4cb6a8a99ce36d38fa4f [2021-11-23 17:19:43,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:19:43,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:19:43,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:19:43,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:19:43,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:19:43,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:19:43" (1/1) ... [2021-11-23 17:19:43,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4533a90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:43, skipping insertion in model container [2021-11-23 17:19:43,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:19:43" (1/1) ... [2021-11-23 17:19:43,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:19:43,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:19:44,074 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/sv-benchmarks/c/eca-rers2012/Problem13_label36.c[1933,1946] [2021-11-23 17:19:45,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:19:45,486 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:19:45,519 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/sv-benchmarks/c/eca-rers2012/Problem13_label36.c[1933,1946] [2021-11-23 17:19:46,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:19:46,316 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:19:46,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46 WrapperNode [2021-11-23 17:19:46,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:19:46,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:19:46,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:19:46,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:19:46,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (1/1) ... [2021-11-23 17:19:46,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (1/1) ... [2021-11-23 17:19:46,717 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5578 [2021-11-23 17:19:46,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:19:46,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:19:46,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:19:46,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:19:46,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (1/1) ... [2021-11-23 17:19:46,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (1/1) ... [2021-11-23 17:19:46,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (1/1) ... [2021-11-23 17:19:46,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (1/1) ... [2021-11-23 17:19:47,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (1/1) ... [2021-11-23 17:19:47,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (1/1) ... [2021-11-23 17:19:47,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (1/1) ... [2021-11-23 17:19:47,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:19:47,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:19:47,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:19:47,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:19:47,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (1/1) ... [2021-11-23 17:19:47,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:19:47,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:19:47,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:19:47,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:19:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:19:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:19:47,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:19:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:19:47,440 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:19:47,442 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:20:36,635 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:20:36,661 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:20:36,662 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:20:36,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:20:36 BoogieIcfgContainer [2021-11-23 17:20:36,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:20:36,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:20:36,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:20:36,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:20:36,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:19:43" (1/3) ... [2021-11-23 17:20:36,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bb6bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:20:36, skipping insertion in model container [2021-11-23 17:20:36,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:19:46" (2/3) ... [2021-11-23 17:20:36,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bb6bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:20:36, skipping insertion in model container [2021-11-23 17:20:36,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:20:36" (3/3) ... [2021-11-23 17:20:36,676 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label36.c [2021-11-23 17:20:36,682 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:20:36,682 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:20:36,741 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:20:36,749 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 [2021-11-23 17:20:36,749 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:20:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2021-11-23 17:20:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:20:36,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:36,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:20:36,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:36,811 INFO L85 PathProgramCache]: Analyzing trace with hash -988188511, now seen corresponding path program 1 times [2021-11-23 17:20:36,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:36,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460127901] [2021-11-23 17:20:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:36,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:36,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:36,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:36,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:20:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:20:36,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:36,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:36,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:37,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460127901] [2021-11-23 17:20:37,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460127901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:37,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:37,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:20:37,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235167025] [2021-11-23 17:20:37,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:37,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:20:37,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:37,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:20:37,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:20:37,044 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-23 17:21:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:39,233 INFO L93 Difference]: Finished difference Result 3024 states and 5630 transitions. [2021-11-23 17:21:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-11-23 17:21:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:39,268 INFO L225 Difference]: With dead ends: 3024 [2021-11-23 17:21:39,268 INFO L226 Difference]: Without dead ends: 1841 [2021-11-23 17:21:39,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:39,281 INFO L933 BasicCegarLoop]: 971 mSDtfsCounter, 862 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 2722 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 3328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 2722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:39,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1161 Invalid, 3328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 2722 Invalid, 0 Unknown, 0 Unchecked, 61.9s Time] [2021-11-23 17:21:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-11-23 17:21:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1836. [2021-11-23 17:21:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 1.5471389645776568) internal successors, (2839), 1835 states have internal predecessors, (2839), 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) [2021-11-23 17:21:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2839 transitions. [2021-11-23 17:21:39,421 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2839 transitions. Word has length 11 [2021-11-23 17:21:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:39,422 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 2839 transitions. [2021-11-23 17:21:39,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-23 17:21:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2839 transitions. [2021-11-23 17:21:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 17:21:39,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:39,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:39,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:21:39,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:39,638 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:39,639 INFO L85 PathProgramCache]: Analyzing trace with hash 749222458, now seen corresponding path program 1 times [2021-11-23 17:21:39,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:39,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137157818] [2021-11-23 17:21:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:39,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:39,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:39,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:39,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:21:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:39,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:21:39,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:40,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:40,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:40,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137157818] [2021-11-23 17:21:40,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137157818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:40,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:40,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:21:40,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229709710] [2021-11-23 17:21:40,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:40,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:40,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:40,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:40,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:40,102 INFO L87 Difference]: Start difference. First operand 1836 states and 2839 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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) [2021-11-23 17:22:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:31,532 INFO L93 Difference]: Finished difference Result 5285 states and 8168 transitions. [2021-11-23 17:22:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 76 [2021-11-23 17:22:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:31,558 INFO L225 Difference]: With dead ends: 5285 [2021-11-23 17:22:31,558 INFO L226 Difference]: Without dead ends: 3451 [2021-11-23 17:22:31,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:31,564 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 923 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:31,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1009 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 51.3s Time] [2021-11-23 17:22:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2021-11-23 17:22:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 3449. [2021-11-23 17:22:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 1.3761600928074247) internal successors, (4745), 3448 states have internal predecessors, (4745), 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) [2021-11-23 17:22:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 4745 transitions. [2021-11-23 17:22:31,704 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 4745 transitions. Word has length 76 [2021-11-23 17:22:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:31,705 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 4745 transitions. [2021-11-23 17:22:31,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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) [2021-11-23 17:22:31,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 4745 transitions. [2021-11-23 17:22:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 17:22:31,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:31,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:31,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:31,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:31,924 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:31,925 INFO L85 PathProgramCache]: Analyzing trace with hash 676439438, now seen corresponding path program 1 times [2021-11-23 17:22:31,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:31,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22874960] [2021-11-23 17:22:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:31,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:31,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:31,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:31,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:22:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:32,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:32,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:32,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22874960] [2021-11-23 17:22:32,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22874960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:32,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:32,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:22:32,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462116225] [2021-11-23 17:22:32,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:32,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:32,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:32,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:32,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:32,492 INFO L87 Difference]: Start difference. First operand 3449 states and 4745 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2021-11-23 17:23:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:34,962 INFO L93 Difference]: Finished difference Result 10081 states and 13864 transitions. [2021-11-23 17:23:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:34,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 84 [2021-11-23 17:23:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:35,012 INFO L225 Difference]: With dead ends: 10081 [2021-11-23 17:23:35,012 INFO L226 Difference]: Without dead ends: 6634 [2021-11-23 17:23:35,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:35,019 INFO L933 BasicCegarLoop]: 1056 mSDtfsCounter, 783 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2511 mSolverCounterSat, 784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 784 IncrementalHoareTripleChecker+Valid, 2511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:35,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1207 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [784 Valid, 2511 Invalid, 0 Unknown, 0 Unchecked, 62.3s Time] [2021-11-23 17:23:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6634 states. [2021-11-23 17:23:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6634 to 6619. [2021-11-23 17:23:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6619 states, 6618 states have (on average 1.2372317920822) internal successors, (8188), 6618 states have internal predecessors, (8188), 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) [2021-11-23 17:23:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 8188 transitions. [2021-11-23 17:23:35,191 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 8188 transitions. Word has length 84 [2021-11-23 17:23:35,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:35,192 INFO L470 AbstractCegarLoop]: Abstraction has 6619 states and 8188 transitions. [2021-11-23 17:23:35,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2021-11-23 17:23:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 8188 transitions. [2021-11-23 17:23:35,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 17:23:35,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:35,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:23:35,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:35,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:35,412 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1786328409, now seen corresponding path program 1 times [2021-11-23 17:23:35,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:35,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858156906] [2021-11-23 17:23:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:35,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:35,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:35,419 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:35,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:23:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:35,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:23:35,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:23:36,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:36,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:36,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858156906] [2021-11-23 17:23:36,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858156906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:36,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:36,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:23:36,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009452287] [2021-11-23 17:23:36,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:36,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:36,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:36,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:36,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:36,796 INFO L87 Difference]: Start difference. First operand 6619 states and 8188 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2021-11-23 17:24:29,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:29,905 INFO L93 Difference]: Finished difference Result 12449 states and 15577 transitions. [2021-11-23 17:24:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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 173 [2021-11-23 17:24:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:29,947 INFO L225 Difference]: With dead ends: 12449 [2021-11-23 17:24:29,947 INFO L226 Difference]: Without dead ends: 6619 [2021-11-23 17:24:29,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:29,957 INFO L933 BasicCegarLoop]: 1087 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:29,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1216 Invalid, 2528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 53.0s Time] [2021-11-23 17:24:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6619 states. [2021-11-23 17:24:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6619 to 6619. [2021-11-23 17:24:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6619 states, 6618 states have (on average 1.2364762768207918) internal successors, (8183), 6618 states have internal predecessors, (8183), 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) [2021-11-23 17:24:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 8183 transitions. [2021-11-23 17:24:30,156 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 8183 transitions. Word has length 173 [2021-11-23 17:24:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:30,157 INFO L470 AbstractCegarLoop]: Abstraction has 6619 states and 8183 transitions. [2021-11-23 17:24:30,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2021-11-23 17:24:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 8183 transitions. [2021-11-23 17:24:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 17:24:30,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:30,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:30,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:30,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:30,384 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:30,385 INFO L85 PathProgramCache]: Analyzing trace with hash -376849136, now seen corresponding path program 1 times [2021-11-23 17:24:30,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:30,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688111514] [2021-11-23 17:24:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:30,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:30,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:30,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:30,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:24:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:30,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:30,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:31,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:31,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:31,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688111514] [2021-11-23 17:24:31,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688111514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:31,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:31,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:24:31,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172609276] [2021-11-23 17:24:31,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:31,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:31,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:31,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:24:31,055 INFO L87 Difference]: Start difference. First operand 6619 states and 8183 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-11-23 17:25:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:34,925 INFO L93 Difference]: Finished difference Result 15631 states and 19950 transitions. [2021-11-23 17:25:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:34,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 180 [2021-11-23 17:25:34,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:34,981 INFO L225 Difference]: With dead ends: 15631 [2021-11-23 17:25:34,981 INFO L226 Difference]: Without dead ends: 9801 [2021-11-23 17:25:34,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:34,990 INFO L933 BasicCegarLoop]: 1722 mSDtfsCounter, 822 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2511 mSolverCounterSat, 731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 3242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Valid, 2511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:34,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 1865 Invalid, 3242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [731 Valid, 2511 Invalid, 0 Unknown, 0 Unchecked, 63.6s Time] [2021-11-23 17:25:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9801 states. [2021-11-23 17:25:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9801 to 9780. [2021-11-23 17:25:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9780 states, 9779 states have (on average 1.1927599959096022) internal successors, (11664), 9779 states have internal predecessors, (11664), 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) [2021-11-23 17:25:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9780 states to 9780 states and 11664 transitions. [2021-11-23 17:25:35,197 INFO L78 Accepts]: Start accepts. Automaton has 9780 states and 11664 transitions. Word has length 180 [2021-11-23 17:25:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:35,199 INFO L470 AbstractCegarLoop]: Abstraction has 9780 states and 11664 transitions. [2021-11-23 17:25:35,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-11-23 17:25:35,200 INFO L276 IsEmpty]: Start isEmpty. Operand 9780 states and 11664 transitions. [2021-11-23 17:25:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-23 17:25:35,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:35,204 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:35,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:35,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:35,418 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2059743232, now seen corresponding path program 1 times [2021-11-23 17:25:35,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:35,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484910875] [2021-11-23 17:25:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:35,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:35,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:35,422 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:35,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:25:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:25:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:39,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:57,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:57,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484910875] [2021-11-23 17:25:57,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484910875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:57,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [576197730] [2021-11-23 17:25:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:57,930 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:57,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:57,944 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:57,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:25:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:58,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:25:58,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:58,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [576197730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:58,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:25:58,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 17:25:58,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881101677] [2021-11-23 17:25:58,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:58,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:58,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:58,676 INFO L87 Difference]: Start difference. First operand 9780 states and 11664 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-11-23 17:26:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:45,518 INFO L93 Difference]: Finished difference Result 25073 states and 30474 transitions. [2021-11-23 17:26:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:45,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 225 [2021-11-23 17:26:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:45,568 INFO L225 Difference]: With dead ends: 25073 [2021-11-23 17:26:45,568 INFO L226 Difference]: Without dead ends: 15295 [2021-11-23 17:26:45,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:45,579 INFO L933 BasicCegarLoop]: 1578 mSDtfsCounter, 998 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 3192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:45,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 1716 Invalid, 3192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 46.6s Time] [2021-11-23 17:26:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15295 states. [2021-11-23 17:26:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15295 to 15293. [2021-11-23 17:26:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15293 states, 15292 states have (on average 1.1684540936437353) internal successors, (17868), 15292 states have internal predecessors, (17868), 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) [2021-11-23 17:26:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15293 states to 15293 states and 17868 transitions. [2021-11-23 17:26:45,915 INFO L78 Accepts]: Start accepts. Automaton has 15293 states and 17868 transitions. Word has length 225 [2021-11-23 17:26:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:45,916 INFO L470 AbstractCegarLoop]: Abstraction has 15293 states and 17868 transitions. [2021-11-23 17:26:45,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-11-23 17:26:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 15293 states and 17868 transitions. [2021-11-23 17:26:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-23 17:26:45,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:45,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:45,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:46,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:46,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:46,322 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1002421225, now seen corresponding path program 1 times [2021-11-23 17:26:46,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:46,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391435809] [2021-11-23 17:26:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:46,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:46,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:46,326 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:46,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:26:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:26:46,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 162 proven. 88 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:26:47,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 162 proven. 88 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:26:49,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:49,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391435809] [2021-11-23 17:26:49,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391435809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:49,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603904449] [2021-11-23 17:26:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:49,901 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:49,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:49,902 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:49,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:26:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:50,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:50,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-23 17:26:50,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:50,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603904449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:50,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:26:50,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:26:50,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376928237] [2021-11-23 17:26:50,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:50,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:50,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:50,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:50,440 INFO L87 Difference]: Start difference. First operand 15293 states and 17868 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2021-11-23 17:27:55,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:55,364 INFO L93 Difference]: Finished difference Result 35330 states and 42178 transitions. [2021-11-23 17:27:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:55,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 269 [2021-11-23 17:27:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:55,412 INFO L225 Difference]: With dead ends: 35330 [2021-11-23 17:27:55,413 INFO L226 Difference]: Without dead ends: 20826 [2021-11-23 17:27:55,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 799 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:55,425 INFO L933 BasicCegarLoop]: 1870 mSDtfsCounter, 852 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 3327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:55,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 2016 Invalid, 3327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 2645 Invalid, 0 Unknown, 0 Unchecked, 64.7s Time] [2021-11-23 17:27:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20826 states. [2021-11-23 17:27:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20826 to 20809. [2021-11-23 17:27:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20809 states, 20808 states have (on average 1.1454728950403692) internal successors, (23835), 20808 states have internal predecessors, (23835), 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) [2021-11-23 17:27:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20809 states to 20809 states and 23835 transitions. [2021-11-23 17:27:55,797 INFO L78 Accepts]: Start accepts. Automaton has 20809 states and 23835 transitions. Word has length 269 [2021-11-23 17:27:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:55,798 INFO L470 AbstractCegarLoop]: Abstraction has 20809 states and 23835 transitions. [2021-11-23 17:27:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2021-11-23 17:27:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 20809 states and 23835 transitions. [2021-11-23 17:27:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-23 17:27:55,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:55,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:55,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:56,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:56,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:56,216 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1312002571, now seen corresponding path program 1 times [2021-11-23 17:27:56,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:56,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868581117] [2021-11-23 17:27:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:56,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:56,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:56,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:56,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:27:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:56,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:27:56,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:00,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:22,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868581117] [2021-11-23 17:28:22,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868581117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1964420565] [2021-11-23 17:28:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:22,007 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:22,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:28:22,008 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:28:22,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:28:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:22,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:28:22,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:25,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:28:25,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1964420565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:28:25,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:28:25,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 17:28:25,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766576752] [2021-11-23 17:28:25,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:28:25,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:28:25,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:28:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:28:25,675 INFO L87 Difference]: Start difference. First operand 20809 states and 23835 transitions. Second operand has 4 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 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) [2021-11-23 17:29:04,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:29:14,926 INFO L93 Difference]: Finished difference Result 34579 states and 40286 transitions. [2021-11-23 17:29:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:29:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 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 302 [2021-11-23 17:29:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:29:14,966 INFO L225 Difference]: With dead ends: 34579 [2021-11-23 17:29:14,966 INFO L226 Difference]: Without dead ends: 21650 [2021-11-23 17:29:14,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 897 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:29:14,978 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 1419 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 1977 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:29:14,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1419 Valid, 1977 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 49.0s Time] [2021-11-23 17:29:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21650 states. [2021-11-23 17:29:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21650 to 21596. [2021-11-23 17:29:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21596 states, 21595 states have (on average 1.1413290113452188) internal successors, (24647), 21595 states have internal predecessors, (24647), 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) [2021-11-23 17:29:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21596 states to 21596 states and 24647 transitions. [2021-11-23 17:29:15,357 INFO L78 Accepts]: Start accepts. Automaton has 21596 states and 24647 transitions. Word has length 302 [2021-11-23 17:29:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:29:15,358 INFO L470 AbstractCegarLoop]: Abstraction has 21596 states and 24647 transitions. [2021-11-23 17:29:15,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 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) [2021-11-23 17:29:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 21596 states and 24647 transitions. [2021-11-23 17:29:15,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-23 17:29:15,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:29:15,365 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:29:15,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:15,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:15,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:29:15,776 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:29:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:29:15,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1043546078, now seen corresponding path program 1 times [2021-11-23 17:29:15,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:29:15,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106288045] [2021-11-23 17:29:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:15,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:29:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:29:15,779 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:29:15,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:29:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:15,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:29:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 188 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 17:29:19,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 188 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 17:29:40,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:29:40,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106288045] [2021-11-23 17:29:40,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106288045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:40,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [372991144] [2021-11-23 17:29:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:40,158 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:40,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:29:40,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:29:40,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:29:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:40,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:29:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 17:29:40,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:29:40,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [372991144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:29:40,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:29:40,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:29:40,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989627683] [2021-11-23 17:29:40,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:29:40,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:29:40,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:40,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:29:40,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:29:40,974 INFO L87 Difference]: Start difference. First operand 21596 states and 24647 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2021-11-23 17:30:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:29,136 INFO L93 Difference]: Finished difference Result 47904 states and 55202 transitions. [2021-11-23 17:30:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:30:29,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 308 [2021-11-23 17:30:29,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:29,175 INFO L225 Difference]: With dead ends: 47904 [2021-11-23 17:30:29,176 INFO L226 Difference]: Without dead ends: 27097 [2021-11-23 17:30:29,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:30:29,187 INFO L933 BasicCegarLoop]: 1449 mSDtfsCounter, 1079 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 3113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:29,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1079 Valid, 1537 Invalid, 3113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 47.9s Time] [2021-11-23 17:30:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27097 states. [2021-11-23 17:30:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27097 to 27096. [2021-11-23 17:30:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27096 states, 27095 states have (on average 1.1216091529802548) internal successors, (30390), 27095 states have internal predecessors, (30390), 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) [2021-11-23 17:30:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27096 states to 27096 states and 30390 transitions. [2021-11-23 17:30:29,565 INFO L78 Accepts]: Start accepts. Automaton has 27096 states and 30390 transitions. Word has length 308 [2021-11-23 17:30:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:29,566 INFO L470 AbstractCegarLoop]: Abstraction has 27096 states and 30390 transitions. [2021-11-23 17:30:29,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2021-11-23 17:30:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 27096 states and 30390 transitions. [2021-11-23 17:30:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-23 17:30:29,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:29,579 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:30:29,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:29,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:29,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:29,980 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1130902493, now seen corresponding path program 1 times [2021-11-23 17:30:29,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:29,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825367482] [2021-11-23 17:30:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:29,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:29,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:29,988 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:29,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:30:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:30,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:30:30,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 232 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:30:32,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 232 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:30:45,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:45,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825367482] [2021-11-23 17:30:45,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825367482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:45,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1543339689] [2021-11-23 17:30:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:45,088 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:45,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:30:45,088 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:30:45,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:30:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:30:45,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 17:30:49,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:30:49,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1543339689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:30:49,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:30:49,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2021-11-23 17:30:49,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964247555] [2021-11-23 17:30:49,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:30:49,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:30:49,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:30:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:30:49,365 INFO L87 Difference]: Start difference. First operand 27096 states and 30390 transitions. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2021-11-23 17:31:23,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:50,934 INFO L93 Difference]: Finished difference Result 54983 states and 61821 transitions. [2021-11-23 17:31:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:31:50,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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 393 [2021-11-23 17:31:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:50,976 INFO L225 Difference]: With dead ends: 54983 [2021-11-23 17:31:50,976 INFO L226 Difference]: Without dead ends: 28676 [2021-11-23 17:31:50,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1169 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:31:50,993 INFO L933 BasicCegarLoop]: 1792 mSDtfsCounter, 731 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 4226 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 4422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 4226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:50,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 2064 Invalid, 4422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 4226 Invalid, 0 Unknown, 0 Unchecked, 61.3s Time] [2021-11-23 17:31:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28676 states. [2021-11-23 17:31:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28676 to 28670. [2021-11-23 17:31:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28670 states, 28669 states have (on average 1.1171997628100039) internal successors, (32029), 28669 states have internal predecessors, (32029), 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) [2021-11-23 17:31:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28670 states to 28670 states and 32029 transitions. [2021-11-23 17:31:51,479 INFO L78 Accepts]: Start accepts. Automaton has 28670 states and 32029 transitions. Word has length 393 [2021-11-23 17:31:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:51,480 INFO L470 AbstractCegarLoop]: Abstraction has 28670 states and 32029 transitions. [2021-11-23 17:31:51,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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) [2021-11-23 17:31:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 28670 states and 32029 transitions. [2021-11-23 17:31:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-23 17:31:51,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:51,490 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:51,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:51,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-23 17:31:51,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:51,917 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:51,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1141872978, now seen corresponding path program 1 times [2021-11-23 17:31:51,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:51,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048096826] [2021-11-23 17:31:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:51,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:51,923 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:51,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:31:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:52,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:31:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 232 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:31:54,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 232 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:32:08,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:08,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048096826] [2021-11-23 17:32:08,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048096826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:08,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1507261731] [2021-11-23 17:32:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:08,399 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:08,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:08,423 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:08,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3996b993-bd61-4eba-a8a0-9136ac35b5c5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:32:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:08,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:32:08,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-23 17:32:09,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:09,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1507261731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:09,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:32:09,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2021-11-23 17:32:09,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129891005] [2021-11-23 17:32:09,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:09,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:32:09,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:09,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:32:09,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:32:09,287 INFO L87 Difference]: Start difference. First operand 28670 states and 32029 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 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)