./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label06.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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/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 e9764aa77a297d88a5c4424b1d4363c7dc0ea34b016b7ff505243e4a2273d457 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:17:27,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:17:27,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:17:27,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:17:27,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:17:27,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:17:27,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:17:27,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:17:27,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:17:27,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:17:27,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:17:27,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:17:27,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:17:27,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:17:27,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:17:27,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:17:27,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:17:27,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:17:27,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:17:27,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:17:27,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:17:27,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:17:27,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:17:27,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:17:27,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:17:27,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:17:27,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:17:27,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:17:27,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:17:27,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:17:27,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:17:27,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:17:27,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:17:27,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:17:27,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:17:27,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:17:27,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:17:27,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:17:27,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:17:27,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:17:27,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:17:27,809 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:17:27,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:17:27,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:17:27,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:17:27,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:17:27,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:17:27,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:17:27,848 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:17:27,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:17:27,849 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:17:27,849 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:17:27,849 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:17:27,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:17:27,849 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:17:27,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:17:27,850 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:17:27,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:17:27,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:17:27,851 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:17:27,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:17:27,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:17:27,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:17:27,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:17:27,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:17:27,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:17:27,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:17:27,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:17:27,853 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:17:27,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:17:27,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:17:27,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:17:27,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:17:27,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:17:27,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:27,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:17:27,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:17:27,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:17:27,856 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:17:27,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:17:27,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:17:27,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:17:27,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:17:27,857 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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9764aa77a297d88a5c4424b1d4363c7dc0ea34b016b7ff505243e4a2273d457 [2021-11-23 17:17:28,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:17:28,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:17:28,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:17:28,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:17:28,186 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:17:28,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2021-11-23 17:17:28,280 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/data/3e44ef309/bc0edfc89c844854848485ac7a0859d5/FLAG9818013f4 [2021-11-23 17:17:29,102 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:17:29,103 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2021-11-23 17:17:29,134 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/data/3e44ef309/bc0edfc89c844854848485ac7a0859d5/FLAG9818013f4 [2021-11-23 17:17:29,285 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/data/3e44ef309/bc0edfc89c844854848485ac7a0859d5 [2021-11-23 17:17:29,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:17:29,293 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:17:29,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:29,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:17:29,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:17:29,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1dba05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:29, skipping insertion in model container [2021-11-23 17:17:29,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:29" (1/1) ... [2021-11-23 17:17:29,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:17:29,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:17:29,781 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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/sv-benchmarks/c/eca-rers2012/Problem17_label06.c[4782,4795] [2021-11-23 17:17:30,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:30,551 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:17:30,592 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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/sv-benchmarks/c/eca-rers2012/Problem17_label06.c[4782,4795] [2021-11-23 17:17:31,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:31,110 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:17:31,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31 WrapperNode [2021-11-23 17:17:31,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:31,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:31,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:17:31,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:17:31,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31" (1/1) ... [2021-11-23 17:17:31,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31" (1/1) ... [2021-11-23 17:17:31,516 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-23 17:17:31,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:31,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:17:31,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:17:31,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:17:31,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31" (1/1) ... [2021-11-23 17:17:31,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31" (1/1) ... [2021-11-23 17:17:31,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31" (1/1) ... [2021-11-23 17:17:31,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31" (1/1) ... [2021-11-23 17:17:31,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31" (1/1) ... [2021-11-23 17:17:31,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31" (1/1) ... [2021-11-23 17:17:31,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31" (1/1) ... [2021-11-23 17:17:31,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:17:31,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:17:31,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:17:31,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:17:31,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:31" (1/1) ... [2021-11-23 17:17:31,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:32,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:32,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:17:32,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:17:32,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:17:32,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:17:32,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:17:32,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:17:32,151 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:17:32,153 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:17:36,364 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:17:36,418 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 17:17:36,429 INFO L158 Benchmark]: Toolchain (without parser) took 7133.41ms. Allocated memory was 111.1MB in the beginning and 327.2MB in the end (delta: 216.0MB). Free memory was 85.9MB in the beginning and 143.9MB in the end (delta: -58.0MB). Peak memory consumption was 164.4MB. Max. memory is 16.1GB. [2021-11-23 17:17:36,431 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 83.9MB. Free memory was 56.2MB in the beginning and 56.2MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:17:36,432 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1813.95ms. Allocated memory was 111.1MB in the beginning and 163.6MB in the end (delta: 52.4MB). Free memory was 85.9MB in the beginning and 117.4MB in the end (delta: -31.4MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. [2021-11-23 17:17:36,433 INFO L158 Benchmark]: Boogie Procedure Inliner took 404.76ms. Allocated memory is still 163.6MB. Free memory was 117.4MB in the beginning and 81.2MB in the end (delta: 36.1MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. [2021-11-23 17:17:36,434 INFO L158 Benchmark]: Boogie Preprocessor took 466.42ms. Allocated memory is still 163.6MB. Free memory was 81.2MB in the beginning and 64.3MB in the end (delta: 17.0MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. [2021-11-23 17:17:36,435 INFO L158 Benchmark]: RCFGBuilder took 4440.71ms. Allocated memory was 163.6MB in the beginning and 327.2MB in the end (delta: 163.6MB). Free memory was 64.3MB in the beginning and 143.9MB in the end (delta: -79.6MB). Peak memory consumption was 91.9MB. Max. memory is 16.1GB. [2021-11-23 17:17:36,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 83.9MB. Free memory was 56.2MB in the beginning and 56.2MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1813.95ms. Allocated memory was 111.1MB in the beginning and 163.6MB in the end (delta: 52.4MB). Free memory was 85.9MB in the beginning and 117.4MB in the end (delta: -31.4MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 404.76ms. Allocated memory is still 163.6MB. Free memory was 117.4MB in the beginning and 81.2MB in the end (delta: 36.1MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 466.42ms. Allocated memory is still 163.6MB. Free memory was 81.2MB in the beginning and 64.3MB in the end (delta: 17.0MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. * RCFGBuilder took 4440.71ms. Allocated memory was 163.6MB in the beginning and 327.2MB in the end (delta: 163.6MB). Free memory was 64.3MB in the beginning and 143.9MB in the end (delta: -79.6MB). Peak memory consumption was 91.9MB. 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 17:17:36,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally 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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/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 e9764aa77a297d88a5c4424b1d4363c7dc0ea34b016b7ff505243e4a2273d457 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:17:39,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:17:39,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:17:39,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:17:39,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:17:39,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:17:39,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:17:39,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:17:39,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:17:39,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:17:39,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:17:39,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:17:39,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:17:39,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:17:39,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:17:39,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:17:39,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:17:39,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:17:39,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:17:39,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:17:39,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:17:39,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:17:39,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:17:39,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:17:39,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:17:39,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:17:39,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:17:39,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:17:39,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:17:39,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:17:39,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:17:39,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:17:39,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:17:39,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:17:39,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:17:39,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:17:39,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:17:39,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:17:39,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:17:39,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:17:39,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:17:39,142 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:17:39,192 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:17:39,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:17:39,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:17:39,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:17:39,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:17:39,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:17:39,194 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:17:39,195 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:17:39,195 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:17:39,195 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:17:39,196 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:17:39,196 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:17:39,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:17:39,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:17:39,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:17:39,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:17:39,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:17:39,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:17:39,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:17:39,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:17:39,199 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:17:39,199 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:17:39,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:17:39,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:17:39,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:17:39,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:17:39,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:17:39,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:17:39,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:17:39,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:39,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:17:39,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:17:39,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:17:39,202 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:17:39,202 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:39,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:17:39,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:17:39,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:17:39,203 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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9764aa77a297d88a5c4424b1d4363c7dc0ea34b016b7ff505243e4a2273d457 [2021-11-23 17:17:39,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:17:39,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:17:39,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:17:39,634 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:17:39,635 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:17:39,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2021-11-23 17:17:39,724 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/data/e9dbb5dd1/1893e0d595bc4eeda4684da0cf3e01f0/FLAGe1d29ec1f [2021-11-23 17:17:40,622 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:17:40,623 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2021-11-23 17:17:40,653 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/data/e9dbb5dd1/1893e0d595bc4eeda4684da0cf3e01f0/FLAGe1d29ec1f [2021-11-23 17:17:40,724 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/data/e9dbb5dd1/1893e0d595bc4eeda4684da0cf3e01f0 [2021-11-23 17:17:40,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:17:40,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:17:40,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:40,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:17:40,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:17:40,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:40" (1/1) ... [2021-11-23 17:17:40,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@159c8372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:40, skipping insertion in model container [2021-11-23 17:17:40,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:40" (1/1) ... [2021-11-23 17:17:40,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:17:40,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:17:41,168 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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/sv-benchmarks/c/eca-rers2012/Problem17_label06.c[4782,4795] [2021-11-23 17:17:41,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:42,011 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:17:42,051 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_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/sv-benchmarks/c/eca-rers2012/Problem17_label06.c[4782,4795] [2021-11-23 17:17:42,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:42,569 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:17:42,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42 WrapperNode [2021-11-23 17:17:42,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:42,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:42,571 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:17:42,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:17:42,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,818 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2608 [2021-11-23 17:17:42,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:42,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:17:42,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:17:42,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:17:42,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:43,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:43,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:43,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:17:43,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:17:43,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:17:43,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:17:43,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:43,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:43,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:17:43,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:17:43,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:17:43,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:17:43,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:17:43,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:17:43,215 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:17:43,217 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:18:16,233 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:18:16,252 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:18:16,252 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:18:16,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:18:16 BoogieIcfgContainer [2021-11-23 17:18:16,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:18:16,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:18:16,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:18:16,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:18:16,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:17:40" (1/3) ... [2021-11-23 17:18:16,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38411215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:18:16, skipping insertion in model container [2021-11-23 17:18:16,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (2/3) ... [2021-11-23 17:18:16,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38411215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:18:16, skipping insertion in model container [2021-11-23 17:18:16,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:18:16" (3/3) ... [2021-11-23 17:18:16,266 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label06.c [2021-11-23 17:18:16,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:18:16,272 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:18:16,334 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:18:16,344 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 17:18:16,344 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:18:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 17:18:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 17:18:16,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:16,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:18:16,393 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:16,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:16,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2021-11-23 17:18:16,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:16,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806400495] [2021-11-23 17:18:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:16,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:16,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:16,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:16,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:18:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:16,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:16,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:16,792 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 17:18:16,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:16,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806400495] [2021-11-23 17:18:16,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806400495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:16,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:16,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:18:16,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626042867] [2021-11-23 17:18:16,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:16,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:16,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:16,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:16,883 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 17:18:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:55,829 INFO L93 Difference]: Finished difference Result 1641 states and 3026 transitions. [2021-11-23 17:18:55,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 31 [2021-11-23 17:18:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:55,854 INFO L225 Difference]: With dead ends: 1641 [2021-11-23 17:18:55,854 INFO L226 Difference]: Without dead ends: 974 [2021-11-23 17:18:55,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 17:18:55,865 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 454 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:55,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 502 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 38.7s Time] [2021-11-23 17:18:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-23 17:18:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 965. [2021-11-23 17:18:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 1.553941908713693) internal successors, (1498), 964 states have internal predecessors, (1498), 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 17:18:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1498 transitions. [2021-11-23 17:18:55,984 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1498 transitions. Word has length 31 [2021-11-23 17:18:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:55,985 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1498 transitions. [2021-11-23 17:18:55,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 17:18:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1498 transitions. [2021-11-23 17:18:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 17:18:55,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:55,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-11-23 17:18:56,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:18:56,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:56,195 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash -36229734, now seen corresponding path program 1 times [2021-11-23 17:18:56,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:56,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583765233] [2021-11-23 17:18:56,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:56,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:56,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:56,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:56,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:18:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:56,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:56,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:56,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:56,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583765233] [2021-11-23 17:18:56,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583765233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:56,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:56,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:18:56,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916831015] [2021-11-23 17:18:56,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:56,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:56,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:56,753 INFO L87 Difference]: Start difference. First operand 965 states and 1498 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 17:19:31,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:31,595 INFO L93 Difference]: Finished difference Result 2356 states and 3779 transitions. [2021-11-23 17:19:31,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:19:31,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 98 [2021-11-23 17:19:31,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:31,605 INFO L225 Difference]: With dead ends: 2356 [2021-11-23 17:19:31,605 INFO L226 Difference]: Without dead ends: 1393 [2021-11-23 17:19:31,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 96 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 17:19:31,608 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 392 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:31,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 34.7s Time] [2021-11-23 17:19:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-11-23 17:19:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1393. [2021-11-23 17:19:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.3038793103448276) internal successors, (1815), 1392 states have internal predecessors, (1815), 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 17:19:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1815 transitions. [2021-11-23 17:19:31,658 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1815 transitions. Word has length 98 [2021-11-23 17:19:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:31,659 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 1815 transitions. [2021-11-23 17:19:31,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 17:19:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1815 transitions. [2021-11-23 17:19:31,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:19:31,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:31,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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 17:19:31,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:31,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:31,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1041259748, now seen corresponding path program 1 times [2021-11-23 17:19:31,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:31,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818988573] [2021-11-23 17:19:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:31,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:31,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:31,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:31,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:19:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:19:32,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:34,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:55,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:55,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818988573] [2021-11-23 17:19:55,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818988573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:19:55,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1906004479] [2021-11-23 17:19:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:55,985 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:19:55,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:19:55,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:19:55,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:19:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:56,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:19:56,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:57,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:58,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1906004479] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:19:58,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:19:58,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2021-11-23 17:19:58,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460602404] [2021-11-23 17:19:58,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:58,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:19:58,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:58,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:19:58,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:19:58,043 INFO L87 Difference]: Start difference. First operand 1393 states and 1815 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 17:20:49,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:20:59,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:21:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:02,055 INFO L93 Difference]: Finished difference Result 3224 states and 4432 transitions. [2021-11-23 17:21:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:02,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 101 [2021-11-23 17:21:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:02,074 INFO L225 Difference]: With dead ends: 3224 [2021-11-23 17:21:02,074 INFO L226 Difference]: Without dead ends: 2258 [2021-11-23 17:21:02,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:21:02,078 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 555 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:02,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 223 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 63.9s Time] [2021-11-23 17:21:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-11-23 17:21:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1831. [2021-11-23 17:21:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 1.3879781420765027) internal successors, (2540), 1830 states have internal predecessors, (2540), 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 17:21:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2540 transitions. [2021-11-23 17:21:02,130 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2540 transitions. Word has length 101 [2021-11-23 17:21:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:02,131 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 2540 transitions. [2021-11-23 17:21:02,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 17:21:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2540 transitions. [2021-11-23 17:21:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-23 17:21:02,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:02,136 INFO L514 BasicCegarLoop]: trace histogram [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, 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 17:21:02,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:02,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 17:21:02,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:02,549 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:02,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1447554583, now seen corresponding path program 1 times [2021-11-23 17:21:02,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:02,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372432403] [2021-11-23 17:21:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:02,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:02,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:02,564 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:02,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:21:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:02,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:21:02,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 57 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:03,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:04,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:04,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372432403] [2021-11-23 17:21:04,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372432403] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:21:04,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:21:04,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:21:04,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267944399] [2021-11-23 17:21:04,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:04,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:04,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:04,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:04,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:21:04,137 INFO L87 Difference]: Start difference. First operand 1831 states and 2540 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 17:21:35,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:21:40,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:14,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:16,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:21,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:25,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:40,675 WARN L534 Checker$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 17:22:47,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:51,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:02,496 INFO L93 Difference]: Finished difference Result 5370 states and 7455 transitions. [2021-11-23 17:23:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:02,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 181 [2021-11-23 17:23:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:02,523 INFO L225 Difference]: With dead ends: 5370 [2021-11-23 17:23:02,524 INFO L226 Difference]: Without dead ends: 3105 [2021-11-23 17:23:02,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:23:02,528 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 500 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:02,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 717 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 118.2s Time] [2021-11-23 17:23:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-11-23 17:23:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 3100. [2021-11-23 17:23:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 3099 states have (on average 1.2587931590835753) internal successors, (3901), 3099 states have internal predecessors, (3901), 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 17:23:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 3901 transitions. [2021-11-23 17:23:02,622 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 3901 transitions. Word has length 181 [2021-11-23 17:23:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:02,624 INFO L470 AbstractCegarLoop]: Abstraction has 3100 states and 3901 transitions. [2021-11-23 17:23:02,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 17:23:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 3901 transitions. [2021-11-23 17:23:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-23 17:23:02,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:02,629 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-23 17:23:02,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:02,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:02,847 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:02,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:02,848 INFO L85 PathProgramCache]: Analyzing trace with hash 851513907, now seen corresponding path program 1 times [2021-11-23 17:23:02,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:02,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822148574] [2021-11-23 17:23:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:02,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:02,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:02,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:02,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:23:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:03,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:23:03,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 57 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:03,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 57 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:07,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822148574] [2021-11-23 17:23:07,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822148574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [759849901] [2021-11-23 17:23:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:07,885 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:07,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:23:07,891 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:23:07,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:23:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:23:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 17:23:08,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:08,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [759849901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:08,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:23:08,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 17:23:08,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623235639] [2021-11-23 17:23:08,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:08,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:23:08,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:08,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:23:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:23:08,868 INFO L87 Difference]: Start difference. First operand 3100 states and 3901 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 17:24:07,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:24,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:24,920 INFO L93 Difference]: Finished difference Result 11320 states and 14070 transitions. [2021-11-23 17:24:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:24:24,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 185 [2021-11-23 17:24:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:24,972 INFO L225 Difference]: With dead ends: 11320 [2021-11-23 17:24:24,972 INFO L226 Difference]: Without dead ends: 7350 [2021-11-23 17:24:24,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:24:24,980 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1335 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:24,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1335 Valid, 131 Invalid, 2753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 75.8s Time] [2021-11-23 17:24:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7350 states. [2021-11-23 17:24:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7350 to 5213. [2021-11-23 17:24:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 5212 states have (on average 1.219493476592479) internal successors, (6356), 5212 states have internal predecessors, (6356), 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 17:24:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 6356 transitions. [2021-11-23 17:24:25,171 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 6356 transitions. Word has length 185 [2021-11-23 17:24:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:25,172 INFO L470 AbstractCegarLoop]: Abstraction has 5213 states and 6356 transitions. [2021-11-23 17:24:25,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 17:24:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 6356 transitions. [2021-11-23 17:24:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-23 17:24:25,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:25,177 INFO L514 BasicCegarLoop]: trace histogram [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, 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 17:24:25,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:25,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-23 17:24:25,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:25,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:25,594 INFO L85 PathProgramCache]: Analyzing trace with hash -731811040, now seen corresponding path program 1 times [2021-11-23 17:24:25,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:25,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218909171] [2021-11-23 17:24:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:25,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:25,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:25,597 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:25,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:24:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:25,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:24:25,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:27,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:30,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218909171] [2021-11-23 17:24:30,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218909171] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:24:30,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:24:30,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:24:30,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617013658] [2021-11-23 17:24:30,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:30,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:30,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:24:30,132 INFO L87 Difference]: Start difference. First operand 5213 states and 6356 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 17:25:01,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:11,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:19,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:28,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:34,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:52,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:12,258 INFO L93 Difference]: Finished difference Result 13831 states and 16906 transitions. [2021-11-23 17:26:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:12,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 213 [2021-11-23 17:26:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:12,312 INFO L225 Difference]: With dead ends: 13831 [2021-11-23 17:26:12,312 INFO L226 Difference]: Without dead ends: 8620 [2021-11-23 17:26:12,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:12,348 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 410 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 367 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:12,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 107 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 1190 Invalid, 1 Unknown, 0 Unchecked, 102.0s Time] [2021-11-23 17:26:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8620 states. [2021-11-23 17:26:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8620 to 6915. [2021-11-23 17:26:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6915 states, 6914 states have (on average 1.2574486549030952) internal successors, (8694), 6914 states have internal predecessors, (8694), 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 17:26:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 8694 transitions. [2021-11-23 17:26:12,520 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 8694 transitions. Word has length 213 [2021-11-23 17:26:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:12,522 INFO L470 AbstractCegarLoop]: Abstraction has 6915 states and 8694 transitions. [2021-11-23 17:26:12,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 17:26:12,523 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 8694 transitions. [2021-11-23 17:26:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-23 17:26:12,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:12,528 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-23 17:26:12,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 17:26:12,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:12,744 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:12,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:12,744 INFO L85 PathProgramCache]: Analyzing trace with hash -416884365, now seen corresponding path program 1 times [2021-11-23 17:26:12,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:12,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353960536] [2021-11-23 17:26:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:12,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:12,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:12,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:12,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:26:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:12,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:26:12,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:13,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:17,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353960536] [2021-11-23 17:26:17,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353960536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1336793430] [2021-11-23 17:26:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:17,470 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:17,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:17,472 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:17,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:26:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:26:17,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 17:26:17,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:17,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1336793430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:17,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:26:17,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:26:17,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824016990] [2021-11-23 17:26:17,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:17,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:17,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:17,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:17,958 INFO L87 Difference]: Start difference. First operand 6915 states and 8694 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:44,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:55,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:55,799 INFO L93 Difference]: Finished difference Result 15105 states and 18937 transitions. [2021-11-23 17:26:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:55,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2021-11-23 17:26:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:55,848 INFO L225 Difference]: With dead ends: 15105 [2021-11-23 17:26:55,848 INFO L226 Difference]: Without dead ends: 8192 [2021-11-23 17:26:55,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:26:55,859 INFO L933 BasicCegarLoop]: 765 mSDtfsCounter, 439 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:55,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 824 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 37.7s Time] [2021-11-23 17:26:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8192 states. [2021-11-23 17:26:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8192 to 8190. [2021-11-23 17:26:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8190 states, 8189 states have (on average 1.2290878007082673) internal successors, (10065), 8189 states have internal predecessors, (10065), 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 17:26:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8190 states to 8190 states and 10065 transitions. [2021-11-23 17:26:56,079 INFO L78 Accepts]: Start accepts. Automaton has 8190 states and 10065 transitions. Word has length 230 [2021-11-23 17:26:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:56,080 INFO L470 AbstractCegarLoop]: Abstraction has 8190 states and 10065 transitions. [2021-11-23 17:26:56,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 8190 states and 10065 transitions. [2021-11-23 17:26:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-23 17:26:56,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:56,088 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:56,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:56,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:56,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:56,504 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:56,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2045348191, now seen corresponding path program 1 times [2021-11-23 17:26:56,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:56,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638451393] [2021-11-23 17:26:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:56,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:56,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:56,508 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:56,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:26:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:56,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:57,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:57,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:57,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638451393] [2021-11-23 17:26:57,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638451393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:57,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:57,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:57,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361291921] [2021-11-23 17:26:57,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:57,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:57,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:57,463 INFO L87 Difference]: Start difference. First operand 8190 states and 10065 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 17:27:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:18,682 INFO L93 Difference]: Finished difference Result 21478 states and 26739 transitions. [2021-11-23 17:27:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:18,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 262 [2021-11-23 17:27:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:18,727 INFO L225 Difference]: With dead ends: 21478 [2021-11-23 17:27:18,727 INFO L226 Difference]: Without dead ends: 13290 [2021-11-23 17:27:18,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 260 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 17:27:18,736 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 417 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:18,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 711 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 21.1s Time] [2021-11-23 17:27:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13290 states. [2021-11-23 17:27:18,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13290 to 12440. [2021-11-23 17:27:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12440 states, 12439 states have (on average 1.2077337406543935) internal successors, (15023), 12439 states have internal predecessors, (15023), 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 17:27:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12440 states to 12440 states and 15023 transitions. [2021-11-23 17:27:19,031 INFO L78 Accepts]: Start accepts. Automaton has 12440 states and 15023 transitions. Word has length 262 [2021-11-23 17:27:19,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:19,032 INFO L470 AbstractCegarLoop]: Abstraction has 12440 states and 15023 transitions. [2021-11-23 17:27:19,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 17:27:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 12440 states and 15023 transitions. [2021-11-23 17:27:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-23 17:27:19,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:19,046 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:19,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:19,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:19,262 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:19,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:19,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1146627902, now seen corresponding path program 1 times [2021-11-23 17:27:19,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:19,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576818498] [2021-11-23 17:27:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:19,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:19,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:19,265 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:19,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:27:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:19,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 17:27:20,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 17:27:25,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:25,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576818498] [2021-11-23 17:27:25,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576818498] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [959793504] [2021-11-23 17:27:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:25,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:25,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:25,126 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:25,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:27:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:26,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:27:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 17:27:27,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 17:27:33,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [959793504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:33,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431705353] [2021-11-23 17:27:33,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:33,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:33,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:33,495 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:33,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ebfdaa-8432-4bbe-a43c-b81abcbc2c95/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 17:27:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:33,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:27:33,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 17:27:34,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 17:27:42,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431705353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:42,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:42,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2021-11-23 17:27:42,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278541772] [2021-11-23 17:27:42,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:42,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:27:42,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:27:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:27:42,805 INFO L87 Difference]: Start difference. First operand 12440 states and 15023 transitions. Second operand has 9 states, 9 states have (on average 88.11111111111111) internal successors, (793), 8 states have internal predecessors, (793), 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 17:27:53,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:15,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:32,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:48,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:57,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:19,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:51,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:57,141 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:11,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:26,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:31,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:38,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:57,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []