./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/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 8ec94212d42d56ec4ec8ccfb1876cba582c3e983611a6a88d38f3b3edc8b85b6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:18:22,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:18:22,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:18:23,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:18:23,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:18:23,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:18:23,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:18:23,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:18:23,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:18:23,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:18:23,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:18:23,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:18:23,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:18:23,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:18:23,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:18:23,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:18:23,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:18:23,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:18:23,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:18:23,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:18:23,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:18:23,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:18:23,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:18:23,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:18:23,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:18:23,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:18:23,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:18:23,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:18:23,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:18:23,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:18:23,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:18:23,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:18:23,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:18:23,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:18:23,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:18:23,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:18:23,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:18:23,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:18:23,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:18:23,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:18:23,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:18:23,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:18:23,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:18:23,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:18:23,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:18:23,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:18:23,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:18:23,175 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:18:23,176 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:18:23,176 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:18:23,176 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:18:23,176 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:18:23,177 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:18:23,178 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:18:23,178 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:18:23,178 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:18:23,178 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:18:23,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:18:23,179 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:18:23,179 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:18:23,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:18:23,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:18:23,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:18:23,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:18:23,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:18:23,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:18:23,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:18:23,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:18:23,182 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:18:23,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:18:23,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:18:23,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:18:23,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:18:23,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:18:23,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:18:23,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:18:23,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:18:23,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:18:23,185 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:18:23,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:18:23,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:18:23,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:18:23,185 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:18:23,185 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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec94212d42d56ec4ec8ccfb1876cba582c3e983611a6a88d38f3b3edc8b85b6 [2021-11-23 17:18:23,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:18:23,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:18:23,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:18:23,528 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:18:23,529 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:18:23,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-11-23 17:18:23,607 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/data/4c502b1c9/1bdf6a5289314c99a07f0abca2173ff2/FLAG1632aa722 [2021-11-23 17:18:24,214 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:18:24,215 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-11-23 17:18:24,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/data/4c502b1c9/1bdf6a5289314c99a07f0abca2173ff2/FLAG1632aa722 [2021-11-23 17:18:24,522 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/data/4c502b1c9/1bdf6a5289314c99a07f0abca2173ff2 [2021-11-23 17:18:24,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:18:24,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:18:24,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:18:24,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:18:24,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:18:24,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:18:24" (1/1) ... [2021-11-23 17:18:24,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f14bc15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:24, skipping insertion in model container [2021-11-23 17:18:24,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:18:24" (1/1) ... [2021-11-23 17:18:24,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:18:24,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:18:24,899 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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c[11552,11565] [2021-11-23 17:18:24,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:18:24,914 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:18:25,012 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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c[11552,11565] [2021-11-23 17:18:25,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:18:25,028 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:18:25,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25 WrapperNode [2021-11-23 17:18:25,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:18:25,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:18:25,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:18:25,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:18:25,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25" (1/1) ... [2021-11-23 17:18:25,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25" (1/1) ... [2021-11-23 17:18:25,087 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 431 [2021-11-23 17:18:25,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:18:25,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:18:25,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:18:25,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:18:25,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25" (1/1) ... [2021-11-23 17:18:25,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25" (1/1) ... [2021-11-23 17:18:25,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25" (1/1) ... [2021-11-23 17:18:25,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25" (1/1) ... [2021-11-23 17:18:25,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25" (1/1) ... [2021-11-23 17:18:25,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25" (1/1) ... [2021-11-23 17:18:25,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25" (1/1) ... [2021-11-23 17:18:25,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:18:25,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:18:25,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:18:25,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:18:25,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:25" (1/1) ... [2021-11-23 17:18:25,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:18:25,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:18:25,167 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:18:25,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:18:25,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:18:25,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:18:25,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:18:25,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:18:25,320 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:18:25,322 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:18:25,970 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:18:26,079 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 17:18:26,104 INFO L158 Benchmark]: Toolchain (without parser) took 1555.72ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 61.7MB in the beginning and 93.5MB in the end (delta: -31.8MB). Peak memory consumption was 30.9MB. Max. memory is 16.1GB. [2021-11-23 17:18:26,106 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory was 78.5MB in the beginning and 78.5MB in the end (delta: 51.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:18:26,108 INFO L158 Benchmark]: CACSL2BoogieTranslator took 500.34ms. Allocated memory is still 100.7MB. Free memory was 61.5MB in the beginning and 69.7MB in the end (delta: -8.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:18:26,110 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.70ms. Allocated memory is still 100.7MB. Free memory was 69.7MB in the beginning and 66.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:18:26,111 INFO L158 Benchmark]: Boogie Preprocessor took 40.93ms. Allocated memory is still 100.7MB. Free memory was 66.7MB in the beginning and 64.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:18:26,112 INFO L158 Benchmark]: RCFGBuilder took 951.38ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 64.3MB in the beginning and 93.5MB in the end (delta: -29.2MB). Peak memory consumption was 35.3MB. Max. memory is 16.1GB. [2021-11-23 17:18:26,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory was 78.5MB in the beginning and 78.5MB in the end (delta: 51.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 500.34ms. Allocated memory is still 100.7MB. Free memory was 61.5MB in the beginning and 69.7MB in the end (delta: -8.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.70ms. Allocated memory is still 100.7MB. Free memory was 69.7MB in the beginning and 66.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.93ms. Allocated memory is still 100.7MB. Free memory was 66.7MB in the beginning and 64.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 951.38ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 64.3MB in the beginning and 93.5MB in the end (delta: -29.2MB). Peak memory consumption was 35.3MB. 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 17:18:26,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/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 8ec94212d42d56ec4ec8ccfb1876cba582c3e983611a6a88d38f3b3edc8b85b6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:18:28,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:18:28,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:18:28,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:18:28,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:18:28,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:18:28,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:18:28,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:18:28,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:18:28,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:18:28,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:18:28,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:18:28,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:18:28,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:18:28,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:18:28,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:18:28,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:18:28,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:18:28,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:18:28,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:18:28,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:18:28,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:18:28,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:18:28,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:18:28,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:18:28,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:18:28,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:18:28,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:18:28,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:18:28,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:18:28,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:18:28,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:18:28,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:18:28,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:18:28,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:18:28,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:18:28,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:18:28,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:18:28,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:18:28,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:18:28,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:18:28,829 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:18:28,884 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:18:28,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:18:28,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:18:28,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:18:28,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:18:28,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:18:28,887 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:18:28,887 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:18:28,888 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:18:28,888 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:18:28,888 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:18:28,889 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:18:28,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:18:28,893 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:18:28,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:18:28,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:18:28,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:18:28,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:18:28,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:18:28,895 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:18:28,899 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:18:28,899 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:18:28,900 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:18:28,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:18:28,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:18:28,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:18:28,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:18:28,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:18:28,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:18:28,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:18:28,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:18:28,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:18:28,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:18:28,904 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:18:28,904 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:18:28,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:18:28,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:18:28,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:18:28,907 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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec94212d42d56ec4ec8ccfb1876cba582c3e983611a6a88d38f3b3edc8b85b6 [2021-11-23 17:18:29,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:18:29,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:18:29,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:18:29,397 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:18:29,398 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:18:29,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-11-23 17:18:29,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/data/33522f245/ec05f2a780ca4a8e81a5f743fac6eca6/FLAGbd8eb787b [2021-11-23 17:18:30,037 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:18:30,037 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-11-23 17:18:30,056 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/data/33522f245/ec05f2a780ca4a8e81a5f743fac6eca6/FLAGbd8eb787b [2021-11-23 17:18:30,356 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/data/33522f245/ec05f2a780ca4a8e81a5f743fac6eca6 [2021-11-23 17:18:30,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:18:30,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:18:30,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:18:30,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:18:30,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:18:30,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:30,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2047b38a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30, skipping insertion in model container [2021-11-23 17:18:30,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:30,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:18:30,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:18:30,692 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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c[11552,11565] [2021-11-23 17:18:30,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:18:30,713 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:18:30,788 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_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c[11552,11565] [2021-11-23 17:18:30,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:18:30,827 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:18:30,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30 WrapperNode [2021-11-23 17:18:30,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:18:30,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:18:30,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:18:30,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:18:30,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:30,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:30,927 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 414 [2021-11-23 17:18:30,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:18:30,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:18:30,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:18:30,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:18:30,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:30,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:30,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:30,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:30,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:31,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:31,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:31,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:18:31,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:18:31,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:18:31,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:18:31,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (1/1) ... [2021-11-23 17:18:31,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:18:31,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:18:31,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:18:31,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:18:31,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:18:31,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:18:31,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:18:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:18:31,280 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:18:31,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:18:31,974 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:18:31,984 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:18:31,984 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:18:31,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:18:31 BoogieIcfgContainer [2021-11-23 17:18:31,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:18:31,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:18:31,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:18:31,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:18:31,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:18:30" (1/3) ... [2021-11-23 17:18:31,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cc783d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:18:31, skipping insertion in model container [2021-11-23 17:18:31,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:18:30" (2/3) ... [2021-11-23 17:18:31,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cc783d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:18:31, skipping insertion in model container [2021-11-23 17:18:31,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:18:31" (3/3) ... [2021-11-23 17:18:32,000 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-11-23 17:18:32,009 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:18:32,009 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:18:32,064 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:18:32,071 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 17:18:32,071 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:18:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7364341085271318) internal successors, (224), 130 states have internal predecessors, (224), 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 17:18:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 17:18:32,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:32,130 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, 1, 1, 1, 1, 1, 1] [2021-11-23 17:18:32,131 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:32,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1238377303, now seen corresponding path program 1 times [2021-11-23 17:18:32,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:32,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816213887] [2021-11-23 17:18:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:32,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:32,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:32,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:32,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:18:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:32,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:18:32,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:32,529 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 17:18:32,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:32,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:32,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816213887] [2021-11-23 17:18:32,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816213887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:32,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:32,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:18:32,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018005767] [2021-11-23 17:18:32,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:32,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:18:32,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:18:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:18:32,610 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7364341085271318) internal successors, (224), 130 states have internal predecessors, (224), 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 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 17:18:32,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:32,654 INFO L93 Difference]: Finished difference Result 208 states and 355 transitions. [2021-11-23 17:18:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:18:32,656 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2021-11-23 17:18:32,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:32,669 INFO L225 Difference]: With dead ends: 208 [2021-11-23 17:18:32,669 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 17:18:32,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:18:32,676 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:32,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 17:18:32,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-23 17:18:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.7222222222222223) internal successors, (217), 126 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 217 transitions. [2021-11-23 17:18:32,726 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 217 transitions. Word has length 37 [2021-11-23 17:18:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:32,727 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 217 transitions. [2021-11-23 17:18:32,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 17:18:32,727 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 217 transitions. [2021-11-23 17:18:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 17:18:32,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:32,730 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, 1, 1, 1, 1, 1, 1] [2021-11-23 17:18:32,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:32,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:32,942 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash 420728853, now seen corresponding path program 1 times [2021-11-23 17:18:32,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:32,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141690499] [2021-11-23 17:18:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:32,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:32,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:32,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:32,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:18:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:33,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:18:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:33,256 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 17:18:33,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:33,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:33,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141690499] [2021-11-23 17:18:33,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141690499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:33,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:33,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:18:33,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88204873] [2021-11-23 17:18:33,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:33,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:18:33,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:18:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:18:33,272 INFO L87 Difference]: Start difference. First operand 127 states and 217 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 17:18:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:33,421 INFO L93 Difference]: Finished difference Result 207 states and 348 transitions. [2021-11-23 17:18:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:18:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2021-11-23 17:18:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:33,434 INFO L225 Difference]: With dead ends: 207 [2021-11-23 17:18:33,434 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 17:18:33,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:18:33,437 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 3 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:33,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 836 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:18:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 17:18:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-23 17:18:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5555555555555556) internal successors, (196), 126 states have internal predecessors, (196), 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 17:18:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 196 transitions. [2021-11-23 17:18:33,470 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 196 transitions. Word has length 37 [2021-11-23 17:18:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:33,470 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 196 transitions. [2021-11-23 17:18:33,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 17:18:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 196 transitions. [2021-11-23 17:18:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 17:18:33,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:33,474 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, 1, 1, 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 17:18:33,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:33,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:33,691 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:33,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1846122567, now seen corresponding path program 1 times [2021-11-23 17:18:33,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:33,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145090213] [2021-11-23 17:18:33,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:33,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:33,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:33,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:33,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:18:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:33,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:33,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:33,963 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 17:18:33,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:33,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:33,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145090213] [2021-11-23 17:18:33,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145090213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:33,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:33,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:33,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099678871] [2021-11-23 17:18:33,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:33,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:33,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:33,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:33,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:33,967 INFO L87 Difference]: Start difference. First operand 127 states and 196 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:34,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:34,053 INFO L93 Difference]: Finished difference Result 270 states and 433 transitions. [2021-11-23 17:18:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:34,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-23 17:18:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:34,057 INFO L225 Difference]: With dead ends: 270 [2021-11-23 17:18:34,062 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 17:18:34,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 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 17:18:34,065 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 101 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:34,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 349 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:18:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 17:18:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-11-23 17:18:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.568421052631579) internal successors, (298), 190 states have internal predecessors, (298), 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 17:18:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 298 transitions. [2021-11-23 17:18:34,103 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 298 transitions. Word has length 57 [2021-11-23 17:18:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:34,104 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 298 transitions. [2021-11-23 17:18:34,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 298 transitions. [2021-11-23 17:18:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 17:18:34,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:34,117 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, 1, 1, 1, 1, 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 17:18:34,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:34,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:34,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:34,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1343531320, now seen corresponding path program 1 times [2021-11-23 17:18:34,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:34,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606699287] [2021-11-23 17:18:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:34,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:34,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:34,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:34,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:18:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:18:34,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:34,578 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 17:18:34,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:34,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:34,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606699287] [2021-11-23 17:18:34,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606699287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:34,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:34,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:18:34,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534588665] [2021-11-23 17:18:34,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:34,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:18:34,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:34,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:18:34,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:18:34,582 INFO L87 Difference]: Start difference. First operand 191 states and 298 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 17:18:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:34,651 INFO L93 Difference]: Finished difference Result 552 states and 859 transitions. [2021-11-23 17:18:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:18:34,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 59 [2021-11-23 17:18:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:34,658 INFO L225 Difference]: With dead ends: 552 [2021-11-23 17:18:34,658 INFO L226 Difference]: Without dead ends: 370 [2021-11-23 17:18:34,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 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 17:18:34,671 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 430 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:34,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 447 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-23 17:18:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 368. [2021-11-23 17:18:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.550408719346049) internal successors, (569), 367 states have internal predecessors, (569), 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 17:18:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 569 transitions. [2021-11-23 17:18:34,724 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 569 transitions. Word has length 59 [2021-11-23 17:18:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:34,726 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 569 transitions. [2021-11-23 17:18:34,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 17:18:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 569 transitions. [2021-11-23 17:18:34,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 17:18:34,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:34,730 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, 1, 1, 1, 1, 1, 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 17:18:34,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:34,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:34,941 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:34,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:34,942 INFO L85 PathProgramCache]: Analyzing trace with hash 787394068, now seen corresponding path program 1 times [2021-11-23 17:18:34,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:34,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061287510] [2021-11-23 17:18:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:34,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:34,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:34,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:34,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:18:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:35,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:35,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:35,161 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 17:18:35,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:35,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061287510] [2021-11-23 17:18:35,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061287510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:35,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:35,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:35,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172458837] [2021-11-23 17:18:35,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:35,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:35,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:35,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:35,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:35,176 INFO L87 Difference]: Start difference. First operand 368 states and 569 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:35,216 INFO L93 Difference]: Finished difference Result 1066 states and 1645 transitions. [2021-11-23 17:18:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-23 17:18:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:35,223 INFO L225 Difference]: With dead ends: 1066 [2021-11-23 17:18:35,224 INFO L226 Difference]: Without dead ends: 726 [2021-11-23 17:18:35,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 58 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 17:18:35,226 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 185 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:35,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 553 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-11-23 17:18:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 370. [2021-11-23 17:18:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.5474254742547426) internal successors, (571), 369 states have internal predecessors, (571), 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 17:18:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 571 transitions. [2021-11-23 17:18:35,269 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 571 transitions. Word has length 60 [2021-11-23 17:18:35,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:35,270 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 571 transitions. [2021-11-23 17:18:35,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:35,271 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 571 transitions. [2021-11-23 17:18:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 17:18:35,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:35,274 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, 1, 1, 1, 1, 1, 1, 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 17:18:35,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:35,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:35,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:35,488 INFO L85 PathProgramCache]: Analyzing trace with hash 825263459, now seen corresponding path program 1 times [2021-11-23 17:18:35,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:35,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552240763] [2021-11-23 17:18:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:35,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:35,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:35,491 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:35,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:18:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:35,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:18:35,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:35,783 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 17:18:35,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:35,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:35,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552240763] [2021-11-23 17:18:35,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552240763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:35,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:35,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:18:35,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625398949] [2021-11-23 17:18:35,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:35,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:18:35,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:35,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:18:35,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:18:35,787 INFO L87 Difference]: Start difference. First operand 370 states and 571 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:35,884 INFO L93 Difference]: Finished difference Result 1072 states and 1655 transitions. [2021-11-23 17:18:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:18:35,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 17:18:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:35,892 INFO L225 Difference]: With dead ends: 1072 [2021-11-23 17:18:35,892 INFO L226 Difference]: Without dead ends: 714 [2021-11-23 17:18:35,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 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 17:18:35,895 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 484 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:35,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 386 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-23 17:18:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 712. [2021-11-23 17:18:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.5316455696202531) internal successors, (1089), 711 states have internal predecessors, (1089), 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 17:18:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1089 transitions. [2021-11-23 17:18:35,942 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1089 transitions. Word has length 61 [2021-11-23 17:18:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:35,944 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 1089 transitions. [2021-11-23 17:18:35,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1089 transitions. [2021-11-23 17:18:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 17:18:35,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:35,948 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, 1, 1, 1, 1, 1, 1, 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 17:18:35,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:36,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:36,162 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash -278836839, now seen corresponding path program 1 times [2021-11-23 17:18:36,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:36,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527905457] [2021-11-23 17:18:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:36,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:36,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:36,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:36,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:18:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:36,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:36,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:36,414 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 17:18:36,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:36,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:36,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527905457] [2021-11-23 17:18:36,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527905457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:36,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:36,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:36,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296114684] [2021-11-23 17:18:36,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:36,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:36,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:36,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:36,418 INFO L87 Difference]: Start difference. First operand 712 states and 1089 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:36,471 INFO L93 Difference]: Finished difference Result 1236 states and 1959 transitions. [2021-11-23 17:18:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:36,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 17:18:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:36,480 INFO L225 Difference]: With dead ends: 1236 [2021-11-23 17:18:36,480 INFO L226 Difference]: Without dead ends: 946 [2021-11-23 17:18:36,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 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 17:18:36,483 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 108 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:36,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 453 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-11-23 17:18:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2021-11-23 17:18:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 1.55779427359491) internal successors, (1469), 943 states have internal predecessors, (1469), 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 17:18:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1469 transitions. [2021-11-23 17:18:36,557 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1469 transitions. Word has length 61 [2021-11-23 17:18:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:36,557 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1469 transitions. [2021-11-23 17:18:36,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1469 transitions. [2021-11-23 17:18:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 17:18:36,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:36,560 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, 1, 1, 1, 1, 1, 1, 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 17:18:36,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:36,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:36,780 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash -520350028, now seen corresponding path program 1 times [2021-11-23 17:18:36,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:36,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532041416] [2021-11-23 17:18:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:36,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:36,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:36,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:18:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:36,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:36,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:37,024 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 17:18:37,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:37,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:37,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532041416] [2021-11-23 17:18:37,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532041416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:37,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:37,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:37,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683839670] [2021-11-23 17:18:37,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:37,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:37,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:37,027 INFO L87 Difference]: Start difference. First operand 944 states and 1469 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:37,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:37,128 INFO L93 Difference]: Finished difference Result 2374 states and 3789 transitions. [2021-11-23 17:18:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:37,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 17:18:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:37,143 INFO L225 Difference]: With dead ends: 2374 [2021-11-23 17:18:37,143 INFO L226 Difference]: Without dead ends: 1620 [2021-11-23 17:18:37,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 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 17:18:37,147 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:37,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 363 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-11-23 17:18:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1606. [2021-11-23 17:18:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.5719626168224299) internal successors, (2523), 1605 states have internal predecessors, (2523), 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 17:18:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2523 transitions. [2021-11-23 17:18:37,229 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2523 transitions. Word has length 61 [2021-11-23 17:18:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:37,230 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 2523 transitions. [2021-11-23 17:18:37,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2523 transitions. [2021-11-23 17:18:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 17:18:37,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:37,233 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:37,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:37,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:37,445 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:37,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1863486365, now seen corresponding path program 1 times [2021-11-23 17:18:37,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:37,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228460204] [2021-11-23 17:18:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:37,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:37,446 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:37,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:18:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:37,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:18:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:37,664 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 17:18:37,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:37,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:37,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228460204] [2021-11-23 17:18:37,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228460204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:37,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:37,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:18:37,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182005100] [2021-11-23 17:18:37,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:37,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:18:37,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:18:37,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:18:37,668 INFO L87 Difference]: Start difference. First operand 1606 states and 2523 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:37,832 INFO L93 Difference]: Finished difference Result 4682 states and 7353 transitions. [2021-11-23 17:18:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:18:37,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 17:18:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:37,856 INFO L225 Difference]: With dead ends: 4682 [2021-11-23 17:18:37,856 INFO L226 Difference]: Without dead ends: 3122 [2021-11-23 17:18:37,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 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 17:18:37,861 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 405 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:37,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 436 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-11-23 17:18:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 3120. [2021-11-23 17:18:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3119 states have (on average 1.5591535748637384) internal successors, (4863), 3119 states have internal predecessors, (4863), 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 17:18:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 4863 transitions. [2021-11-23 17:18:38,046 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 4863 transitions. Word has length 63 [2021-11-23 17:18:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:38,046 INFO L470 AbstractCegarLoop]: Abstraction has 3120 states and 4863 transitions. [2021-11-23 17:18:38,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 4863 transitions. [2021-11-23 17:18:38,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:18:38,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:38,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:38,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-23 17:18:38,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:38,260 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:38,261 INFO L85 PathProgramCache]: Analyzing trace with hash 133537327, now seen corresponding path program 1 times [2021-11-23 17:18:38,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:38,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273259066] [2021-11-23 17:18:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:38,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:38,263 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:38,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:18:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:38,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:38,433 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 17:18:38,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:38,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:38,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273259066] [2021-11-23 17:18:38,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273259066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:38,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:38,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:38,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833322853] [2021-11-23 17:18:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:38,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:38,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:38,436 INFO L87 Difference]: Start difference. First operand 3120 states and 4863 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:38,686 INFO L93 Difference]: Finished difference Result 9236 states and 14397 transitions. [2021-11-23 17:18:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 17:18:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:38,724 INFO L225 Difference]: With dead ends: 9236 [2021-11-23 17:18:38,724 INFO L226 Difference]: Without dead ends: 6190 [2021-11-23 17:18:38,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 17:18:38,729 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 171 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:38,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 539 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6190 states. [2021-11-23 17:18:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6190 to 3128. [2021-11-23 17:18:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 1.5577230572433642) internal successors, (4871), 3127 states have internal predecessors, (4871), 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 17:18:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 4871 transitions. [2021-11-23 17:18:38,975 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 4871 transitions. Word has length 64 [2021-11-23 17:18:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:38,975 INFO L470 AbstractCegarLoop]: Abstraction has 3128 states and 4871 transitions. [2021-11-23 17:18:38,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 4871 transitions. [2021-11-23 17:18:38,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:18:38,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:38,979 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:38,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:39,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:39,193 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1194786084, now seen corresponding path program 1 times [2021-11-23 17:18:39,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:39,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840300326] [2021-11-23 17:18:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:39,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:39,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:39,195 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:39,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:18:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:39,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:18:39,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:40,000 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 17:18:40,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:40,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:40,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840300326] [2021-11-23 17:18:40,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840300326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:40,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:40,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:18:40,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113075483] [2021-11-23 17:18:40,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:40,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:18:40,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:40,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:18:40,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:18:40,004 INFO L87 Difference]: Start difference. First operand 3128 states and 4871 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 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 17:18:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:40,201 INFO L93 Difference]: Finished difference Result 4646 states and 7283 transitions. [2021-11-23 17:18:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:18:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 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 65 [2021-11-23 17:18:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:40,227 INFO L225 Difference]: With dead ends: 4646 [2021-11-23 17:18:40,227 INFO L226 Difference]: Without dead ends: 3230 [2021-11-23 17:18:40,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:18:40,231 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 126 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:40,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 658 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2021-11-23 17:18:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3230 states. [2021-11-23 17:18:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3230 to 3145. [2021-11-23 17:18:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 1.5569338422391859) internal successors, (4895), 3144 states have internal predecessors, (4895), 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 17:18:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 4895 transitions. [2021-11-23 17:18:40,424 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 4895 transitions. Word has length 65 [2021-11-23 17:18:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:40,424 INFO L470 AbstractCegarLoop]: Abstraction has 3145 states and 4895 transitions. [2021-11-23 17:18:40,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 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 17:18:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 4895 transitions. [2021-11-23 17:18:40,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:18:40,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:40,429 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:40,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:40,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:40,643 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:40,643 INFO L85 PathProgramCache]: Analyzing trace with hash -183668834, now seen corresponding path program 1 times [2021-11-23 17:18:40,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:40,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404397110] [2021-11-23 17:18:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:40,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:40,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:40,645 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:40,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:18:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:40,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:18:40,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:40,923 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 17:18:40,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:40,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:40,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404397110] [2021-11-23 17:18:40,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404397110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:40,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:40,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:18:40,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770732102] [2021-11-23 17:18:40,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:40,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:18:40,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:40,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:18:40,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:18:40,927 INFO L87 Difference]: Start difference. First operand 3145 states and 4895 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 17:18:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:41,257 INFO L93 Difference]: Finished difference Result 9175 states and 14274 transitions. [2021-11-23 17:18:41,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:18:41,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2021-11-23 17:18:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:41,294 INFO L225 Difference]: With dead ends: 9175 [2021-11-23 17:18:41,294 INFO L226 Difference]: Without dead ends: 6085 [2021-11-23 17:18:41,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 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 17:18:41,300 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 457 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:41,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 385 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-11-23 17:18:41,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 6083. [2021-11-23 17:18:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 6082 states have (on average 1.5384741861229858) internal successors, (9357), 6082 states have internal predecessors, (9357), 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 17:18:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 9357 transitions. [2021-11-23 17:18:41,706 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 9357 transitions. Word has length 65 [2021-11-23 17:18:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:41,707 INFO L470 AbstractCegarLoop]: Abstraction has 6083 states and 9357 transitions. [2021-11-23 17:18:41,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 17:18:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 9357 transitions. [2021-11-23 17:18:41,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:18:41,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:41,712 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:41,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:41,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:41,923 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:41,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash -360399148, now seen corresponding path program 1 times [2021-11-23 17:18:41,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:41,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710115684] [2021-11-23 17:18:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:41,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:41,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:41,926 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:41,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:18:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:42,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:42,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:42,143 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 17:18:42,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:42,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:42,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710115684] [2021-11-23 17:18:42,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710115684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:42,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:42,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:42,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828620358] [2021-11-23 17:18:42,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:42,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:42,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:42,146 INFO L87 Difference]: Start difference. First operand 6083 states and 9357 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 17:18:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:42,616 INFO L93 Difference]: Finished difference Result 11271 states and 17635 transitions. [2021-11-23 17:18:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:42,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-23 17:18:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:42,663 INFO L225 Difference]: With dead ends: 11271 [2021-11-23 17:18:42,664 INFO L226 Difference]: Without dead ends: 8373 [2021-11-23 17:18:42,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 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 17:18:42,670 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 102 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:42,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 448 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8373 states. [2021-11-23 17:18:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8373 to 8371. [2021-11-23 17:18:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8371 states, 8370 states have (on average 1.5446833930704897) internal successors, (12929), 8370 states have internal predecessors, (12929), 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 17:18:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8371 states to 8371 states and 12929 transitions. [2021-11-23 17:18:43,141 INFO L78 Accepts]: Start accepts. Automaton has 8371 states and 12929 transitions. Word has length 65 [2021-11-23 17:18:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:43,142 INFO L470 AbstractCegarLoop]: Abstraction has 8371 states and 12929 transitions. [2021-11-23 17:18:43,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 17:18:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 8371 states and 12929 transitions. [2021-11-23 17:18:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:18:43,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:43,145 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:43,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:43,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:43,356 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:43,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:43,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1890791247, now seen corresponding path program 1 times [2021-11-23 17:18:43,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:43,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564242174] [2021-11-23 17:18:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:43,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:43,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:43,359 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:43,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:18:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:43,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:43,566 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 17:18:43,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:43,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:43,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564242174] [2021-11-23 17:18:43,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564242174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:43,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:43,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:43,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701518914] [2021-11-23 17:18:43,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:43,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:43,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:43,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:43,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:43,569 INFO L87 Difference]: Start difference. First operand 8371 states and 12929 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 17:18:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:44,203 INFO L93 Difference]: Finished difference Result 22679 states and 35491 transitions. [2021-11-23 17:18:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-23 17:18:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:44,245 INFO L225 Difference]: With dead ends: 22679 [2021-11-23 17:18:44,245 INFO L226 Difference]: Without dead ends: 15093 [2021-11-23 17:18:44,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 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 17:18:44,261 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 97 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:44,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 365 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15093 states. [2021-11-23 17:18:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15093 to 14947. [2021-11-23 17:18:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14947 states, 14946 states have (on average 1.5426870065569382) internal successors, (23057), 14946 states have internal predecessors, (23057), 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 17:18:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14947 states to 14947 states and 23057 transitions. [2021-11-23 17:18:45,117 INFO L78 Accepts]: Start accepts. Automaton has 14947 states and 23057 transitions. Word has length 65 [2021-11-23 17:18:45,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:45,118 INFO L470 AbstractCegarLoop]: Abstraction has 14947 states and 23057 transitions. [2021-11-23 17:18:45,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 17:18:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 14947 states and 23057 transitions. [2021-11-23 17:18:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 17:18:45,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:45,123 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:45,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:45,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:45,334 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:45,335 INFO L85 PathProgramCache]: Analyzing trace with hash 470074270, now seen corresponding path program 1 times [2021-11-23 17:18:45,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:45,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459040810] [2021-11-23 17:18:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:45,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:45,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:45,336 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:45,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:18:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:45,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:18:45,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:45,589 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 17:18:45,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:45,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:45,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459040810] [2021-11-23 17:18:45,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459040810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:45,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:45,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:18:45,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570512078] [2021-11-23 17:18:45,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:45,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:18:45,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:45,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:18:45,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:18:45,592 INFO L87 Difference]: Start difference. First operand 14947 states and 23057 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 17:18:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:46,582 INFO L93 Difference]: Finished difference Result 43875 states and 67667 transitions. [2021-11-23 17:18:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:18:46,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 67 [2021-11-23 17:18:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:46,660 INFO L225 Difference]: With dead ends: 43875 [2021-11-23 17:18:46,660 INFO L226 Difference]: Without dead ends: 29087 [2021-11-23 17:18:46,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 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 17:18:46,681 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 390 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:46,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 423 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29087 states. [2021-11-23 17:18:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29087 to 29085. [2021-11-23 17:18:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29085 states, 29084 states have (on average 1.528159812955577) internal successors, (44445), 29084 states have internal predecessors, (44445), 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 17:18:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29085 states to 29085 states and 44445 transitions. [2021-11-23 17:18:48,202 INFO L78 Accepts]: Start accepts. Automaton has 29085 states and 44445 transitions. Word has length 67 [2021-11-23 17:18:48,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:48,203 INFO L470 AbstractCegarLoop]: Abstraction has 29085 states and 44445 transitions. [2021-11-23 17:18:48,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 17:18:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 29085 states and 44445 transitions. [2021-11-23 17:18:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 17:18:48,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:48,222 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:48,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:48,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:48,435 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:48,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:48,436 INFO L85 PathProgramCache]: Analyzing trace with hash -555704342, now seen corresponding path program 1 times [2021-11-23 17:18:48,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:48,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324838458] [2021-11-23 17:18:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:48,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:48,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:48,439 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:48,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:18:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:48,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:48,676 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 17:18:48,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:48,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:48,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324838458] [2021-11-23 17:18:48,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324838458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:48,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:48,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:48,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12627853] [2021-11-23 17:18:48,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:48,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:48,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:48,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:48,680 INFO L87 Difference]: Start difference. First operand 29085 states and 44445 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 17:18:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:50,261 INFO L93 Difference]: Finished difference Result 86175 states and 131987 transitions. [2021-11-23 17:18:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:50,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-11-23 17:18:50,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:50,410 INFO L225 Difference]: With dead ends: 86175 [2021-11-23 17:18:50,410 INFO L226 Difference]: Without dead ends: 57939 [2021-11-23 17:18:50,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 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 17:18:50,449 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 157 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:50,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 537 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57939 states. [2021-11-23 17:18:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57939 to 29117. [2021-11-23 17:18:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29117 states, 29116 states have (on average 1.5275793378211293) internal successors, (44477), 29116 states have internal predecessors, (44477), 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 17:18:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29117 states to 29117 states and 44477 transitions. [2021-11-23 17:18:51,966 INFO L78 Accepts]: Start accepts. Automaton has 29117 states and 44477 transitions. Word has length 68 [2021-11-23 17:18:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:51,967 INFO L470 AbstractCegarLoop]: Abstraction has 29117 states and 44477 transitions. [2021-11-23 17:18:51,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 17:18:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 29117 states and 44477 transitions. [2021-11-23 17:18:51,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:18:51,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:51,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:51,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 17:18:52,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:52,189 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:52,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1799639929, now seen corresponding path program 1 times [2021-11-23 17:18:52,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:52,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192765879] [2021-11-23 17:18:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:52,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:52,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:52,192 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:52,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:18:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:52,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:18:52,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:52,594 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 17:18:52,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:52,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:52,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192765879] [2021-11-23 17:18:52,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192765879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:52,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:52,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:18:52,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731708908] [2021-11-23 17:18:52,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:52,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:18:52,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:52,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:18:52,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:18:52,598 INFO L87 Difference]: Start difference. First operand 29117 states and 44477 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 17:18:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:54,562 INFO L93 Difference]: Finished difference Result 85500 states and 130603 transitions. [2021-11-23 17:18:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:18:54,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 69 [2021-11-23 17:18:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:54,668 INFO L225 Difference]: With dead ends: 85500 [2021-11-23 17:18:54,668 INFO L226 Difference]: Without dead ends: 56634 [2021-11-23 17:18:54,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 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 17:18:54,691 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 442 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:54,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 394 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:18:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56634 states. [2021-11-23 17:18:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56634 to 56632. [2021-11-23 17:18:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56632 states, 56631 states have (on average 1.5130405608235773) internal successors, (85685), 56631 states have internal predecessors, (85685), 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 17:18:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56632 states to 56632 states and 85685 transitions. [2021-11-23 17:18:57,007 INFO L78 Accepts]: Start accepts. Automaton has 56632 states and 85685 transitions. Word has length 69 [2021-11-23 17:18:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:57,008 INFO L470 AbstractCegarLoop]: Abstraction has 56632 states and 85685 transitions. [2021-11-23 17:18:57,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 17:18:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 56632 states and 85685 transitions. [2021-11-23 17:18:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:18:57,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:57,023 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:57,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:57,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:57,235 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:57,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:57,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1090540113, now seen corresponding path program 1 times [2021-11-23 17:18:57,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:57,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366036591] [2021-11-23 17:18:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:57,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:57,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:57,237 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:57,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:18:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:57,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:57,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:57,425 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 17:18:57,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:57,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:57,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366036591] [2021-11-23 17:18:57,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366036591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:57,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:57,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:57,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086582090] [2021-11-23 17:18:57,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:57,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:57,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:57,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:57,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:57,431 INFO L87 Difference]: Start difference. First operand 56632 states and 85685 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 17:18:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:59,836 INFO L93 Difference]: Finished difference Result 107092 states and 163967 transitions. [2021-11-23 17:18:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2021-11-23 17:18:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:59,971 INFO L225 Difference]: With dead ends: 107092 [2021-11-23 17:18:59,972 INFO L226 Difference]: Without dead ends: 78034 [2021-11-23 17:18:59,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 17:18:59,999 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 96 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:00,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 435 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:19:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78034 states. [2021-11-23 17:19:02,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78034 to 78032. [2021-11-23 17:19:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78032 states, 78031 states have (on average 1.5140264766567133) internal successors, (118141), 78031 states have internal predecessors, (118141), 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 17:19:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78032 states to 78032 states and 118141 transitions. [2021-11-23 17:19:03,120 INFO L78 Accepts]: Start accepts. Automaton has 78032 states and 118141 transitions. Word has length 69 [2021-11-23 17:19:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:03,121 INFO L470 AbstractCegarLoop]: Abstraction has 78032 states and 118141 transitions. [2021-11-23 17:19:03,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 17:19:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 78032 states and 118141 transitions. [2021-11-23 17:19:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:19:03,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:03,130 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:03,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:03,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:03,346 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:03,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:03,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1324729974, now seen corresponding path program 1 times [2021-11-23 17:19:03,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:03,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60522380] [2021-11-23 17:19:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:03,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:03,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:03,349 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:03,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67c8b4bd-a2f3-405e-8f31-59d6a1f397db/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:19:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:03,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:19:03,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:03,799 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 17:19:03,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:03,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:03,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60522380] [2021-11-23 17:19:03,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60522380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:03,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:03,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:19:03,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532764643] [2021-11-23 17:19:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:03,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:19:03,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:19:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:19:03,801 INFO L87 Difference]: Start difference. First operand 78032 states and 118141 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 17:19:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:11,439 INFO L93 Difference]: Finished difference Result 301912 states and 464897 transitions. [2021-11-23 17:19:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:19:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 69 [2021-11-23 17:19:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:11,882 INFO L225 Difference]: With dead ends: 301912 [2021-11-23 17:19:11,882 INFO L226 Difference]: Without dead ends: 227030 [2021-11-23 17:19:12,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:19:12,231 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 504 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:12,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 726 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:19:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227030 states.