./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0504_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/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_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0504_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad4b9fd301578a7ddb25530c70896459a49284f596306d3b6d0c853e43916174 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:56:00,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:56:00,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:56:00,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:56:00,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:56:00,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:56:00,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:56:01,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:56:01,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:56:01,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:56:01,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:56:01,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:56:01,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:56:01,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:56:01,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:56:01,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:56:01,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:56:01,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:56:01,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:56:01,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:56:01,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:56:01,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:56:01,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:56:01,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:56:01,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:56:01,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:56:01,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:56:01,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:56:01,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:56:01,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:56:01,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:56:01,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:56:01,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:56:01,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:56:01,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:56:01,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:56:01,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:56:01,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:56:01,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:56:01,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:56:01,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:56:01,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 16:56:01,142 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:56:01,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:56:01,142 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:56:01,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:56:01,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:56:01,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:56:01,144 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:56:01,144 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:56:01,144 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:56:01,145 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:56:01,145 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:56:01,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:56:01,145 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:56:01,146 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:56:01,146 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:56:01,146 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:56:01,146 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:56:01,147 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:56:01,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 16:56:01,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 16:56:01,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:56:01,148 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:56:01,149 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 16:56:01,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:56:01,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:56:01,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:56:01,150 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 16:56:01,150 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 16:56:01,150 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 16:56:01,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:56:01,151 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:56:01,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:56:01,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:56:01,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:56:01,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:56:01,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:56:01,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:56:01,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:56:01,153 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:56:01,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:56:01,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:56:01,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:56:01,154 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_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad4b9fd301578a7ddb25530c70896459a49284f596306d3b6d0c853e43916174 [2021-11-23 16:56:01,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:56:01,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:56:01,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:56:01,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:56:01,482 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:56:01,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/list-ext-properties/test-0504_1.i [2021-11-23 16:56:01,550 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/data/7297abc1f/d40aa87dd3d34b8e91335917034ebcfc/FLAGa7c5a16bf [2021-11-23 16:56:02,077 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:56:02,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/sv-benchmarks/c/list-ext-properties/test-0504_1.i [2021-11-23 16:56:02,134 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/data/7297abc1f/d40aa87dd3d34b8e91335917034ebcfc/FLAGa7c5a16bf [2021-11-23 16:56:02,389 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/data/7297abc1f/d40aa87dd3d34b8e91335917034ebcfc [2021-11-23 16:56:02,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:56:02,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:56:02,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:56:02,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:56:02,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:56:02,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b8eaa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02, skipping insertion in model container [2021-11-23 16:56:02,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:56:02,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:56:02,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:56:02,835 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:56:02,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:56:02,909 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:56:02,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02 WrapperNode [2021-11-23 16:56:02,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:56:02,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:56:02,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:56:02,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:56:02,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,953 INFO L137 Inliner]: procedures = 123, calls = 28, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2021-11-23 16:56:02,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:56:02,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:56:02,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:56:02,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:56:02,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:02,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:56:02,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:56:02,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:56:02,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:56:02,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:02" (1/1) ... [2021-11-23 16:56:03,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:56:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:03,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:56:03,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:56:03,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 16:56:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:56:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 16:56:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:56:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 16:56:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 16:56:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:56:03,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:56:03,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:56:03,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:56:03,290 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:56:03,292 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:56:03,822 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:56:03,867 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:56:03,872 INFO L158 Benchmark]: Toolchain (without parser) took 1477.47ms. Allocated memory is still 92.3MB. Free memory was 69.5MB in the beginning and 37.0MB in the end (delta: 32.5MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. [2021-11-23 16:56:03,873 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 92.3MB. Free memory was 66.8MB in the beginning and 66.7MB in the end (delta: 79.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:56:03,875 INFO L158 Benchmark]: CACSL2BoogieTranslator took 516.01ms. Allocated memory is still 92.3MB. Free memory was 69.2MB in the beginning and 59.9MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:56:03,877 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.06ms. Allocated memory is still 92.3MB. Free memory was 59.9MB in the beginning and 57.6MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 16:56:03,878 INFO L158 Benchmark]: Boogie Preprocessor took 36.61ms. Allocated memory is still 92.3MB. Free memory was 57.6MB in the beginning and 56.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:56:03,879 INFO L158 Benchmark]: RCFGBuilder took 877.76ms. Allocated memory is still 92.3MB. Free memory was 56.1MB in the beginning and 37.3MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-23 16:56:03,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 92.3MB. Free memory was 66.8MB in the beginning and 66.7MB in the end (delta: 79.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 516.01ms. Allocated memory is still 92.3MB. Free memory was 69.2MB in the beginning and 59.9MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.06ms. Allocated memory is still 92.3MB. Free memory was 59.9MB in the beginning and 57.6MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.61ms. Allocated memory is still 92.3MB. Free memory was 57.6MB in the beginning and 56.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 877.76ms. Allocated memory is still 92.3MB. Free memory was 56.1MB in the beginning and 37.3MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:56:03,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/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_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/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_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0504_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad4b9fd301578a7ddb25530c70896459a49284f596306d3b6d0c853e43916174 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:56:06,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:56:06,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:56:06,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:56:06,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:56:06,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:56:06,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:56:06,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:56:06,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:56:06,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:56:06,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:56:06,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:56:06,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:56:06,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:56:06,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:56:06,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:56:06,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:56:06,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:56:06,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:56:06,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:56:06,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:56:06,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:56:06,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:56:06,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:56:06,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:56:06,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:56:06,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:56:06,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:56:06,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:56:06,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:56:06,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:56:06,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:56:06,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:56:06,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:56:06,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:56:06,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:56:06,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:56:06,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:56:06,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:56:06,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:56:06,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:56:06,978 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 16:56:07,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:56:07,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:56:07,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:56:07,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:56:07,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:56:07,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:56:07,030 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:56:07,030 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:56:07,031 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:56:07,031 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:56:07,033 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:56:07,033 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:56:07,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 16:56:07,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 16:56:07,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:56:07,036 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:56:07,036 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 16:56:07,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:56:07,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:56:07,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:56:07,037 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 16:56:07,037 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 16:56:07,038 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 16:56:07,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:56:07,038 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:56:07,039 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:56:07,039 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:56:07,039 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:56:07,039 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:56:07,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:56:07,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:56:07,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:56:07,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:56:07,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:56:07,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:56:07,042 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:56:07,042 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:07,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:56:07,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:56:07,043 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_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad4b9fd301578a7ddb25530c70896459a49284f596306d3b6d0c853e43916174 [2021-11-23 16:56:07,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:56:07,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:56:07,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:56:07,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:56:07,571 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:56:07,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/list-ext-properties/test-0504_1.i [2021-11-23 16:56:07,677 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/data/e0c7077b4/063c814d3ef0408188e5e760f8d6c93d/FLAG1d816baa0 [2021-11-23 16:56:08,490 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:56:08,490 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/sv-benchmarks/c/list-ext-properties/test-0504_1.i [2021-11-23 16:56:08,524 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/data/e0c7077b4/063c814d3ef0408188e5e760f8d6c93d/FLAG1d816baa0 [2021-11-23 16:56:08,715 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/data/e0c7077b4/063c814d3ef0408188e5e760f8d6c93d [2021-11-23 16:56:08,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:56:08,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:56:08,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:56:08,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:56:08,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:56:08,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:56:08" (1/1) ... [2021-11-23 16:56:08,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e06514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:08, skipping insertion in model container [2021-11-23 16:56:08,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:56:08" (1/1) ... [2021-11-23 16:56:08,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:56:08,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:56:09,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:56:09,207 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:56:09,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:56:09,310 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:56:09,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09 WrapperNode [2021-11-23 16:56:09,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:56:09,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:56:09,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:56:09,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:56:09,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (1/1) ... [2021-11-23 16:56:09,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (1/1) ... [2021-11-23 16:56:09,392 INFO L137 Inliner]: procedures = 126, calls = 28, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 101 [2021-11-23 16:56:09,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:56:09,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:56:09,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:56:09,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:56:09,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (1/1) ... [2021-11-23 16:56:09,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (1/1) ... [2021-11-23 16:56:09,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (1/1) ... [2021-11-23 16:56:09,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (1/1) ... [2021-11-23 16:56:09,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (1/1) ... [2021-11-23 16:56:09,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (1/1) ... [2021-11-23 16:56:09,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (1/1) ... [2021-11-23 16:56:09,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:56:09,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:56:09,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:56:09,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:56:09,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (1/1) ... [2021-11-23 16:56:09,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:56:09,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:09,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:56:09,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:56:09,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 16:56:09,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 16:56:09,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:56:09,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 16:56:09,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 16:56:09,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:56:09,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 16:56:09,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:56:09,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:56:09,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:56:09,706 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:56:09,709 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:56:10,419 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:56:10,428 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:56:10,429 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 16:56:10,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:56:10 BoogieIcfgContainer [2021-11-23 16:56:10,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:56:10,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:56:10,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:56:10,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:56:10,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:56:08" (1/3) ... [2021-11-23 16:56:10,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2120f636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:56:10, skipping insertion in model container [2021-11-23 16:56:10,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:56:09" (2/3) ... [2021-11-23 16:56:10,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2120f636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:56:10, skipping insertion in model container [2021-11-23 16:56:10,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:56:10" (3/3) ... [2021-11-23 16:56:10,441 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0504_1.i [2021-11-23 16:56:10,448 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:56:10,448 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2021-11-23 16:56:10,549 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:56:10,563 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 16:56:10,563 INFO L340 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2021-11-23 16:56:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 89 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 16:56:10,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:10,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 16:56:10,611 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash 28700584, now seen corresponding path program 1 times [2021-11-23 16:56:10,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:10,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805716409] [2021-11-23 16:56:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:10,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:10,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:10,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:10,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:56:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:10,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:56:10,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:10,825 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 16:56:10,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:10,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:10,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805716409] [2021-11-23 16:56:10,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805716409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:10,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:10,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:56:10,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440678806] [2021-11-23 16:56:10,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:10,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:10,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:10,875 INFO L87 Difference]: Start difference. First operand has 90 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 89 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 16:56:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:10,965 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2021-11-23 16:56:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:10,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-23 16:56:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:10,985 INFO L225 Difference]: With dead ends: 97 [2021-11-23 16:56:10,985 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 16:56:10,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 16:56:10,996 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:10,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 180 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:56:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 16:56:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2021-11-23 16:56:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 89 states have internal predecessors, (96), 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 16:56:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-11-23 16:56:11,057 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 5 [2021-11-23 16:56:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:11,058 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-11-23 16:56:11,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 16:56:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-11-23 16:56:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 16:56:11,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:11,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 16:56:11,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 16:56:11,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:11,278 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash 28699819, now seen corresponding path program 1 times [2021-11-23 16:56:11,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:11,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971474117] [2021-11-23 16:56:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:11,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:11,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:11,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:11,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:56:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:11,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:56:11,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:11,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:11,413 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 16:56:11,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:11,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:11,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971474117] [2021-11-23 16:56:11,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971474117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:11,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:11,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:56:11,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444759452] [2021-11-23 16:56:11,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:11,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:11,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:11,418 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 16:56:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:11,774 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2021-11-23 16:56:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:11,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-23 16:56:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:11,778 INFO L225 Difference]: With dead ends: 115 [2021-11-23 16:56:11,778 INFO L226 Difference]: Without dead ends: 115 [2021-11-23 16:56:11,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 16:56:11,780 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 78 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:11,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 67 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:56:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-23 16:56:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2021-11-23 16:56:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.872340425531915) internal successors, (88), 81 states have internal predecessors, (88), 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 16:56:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2021-11-23 16:56:11,795 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 5 [2021-11-23 16:56:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:11,796 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2021-11-23 16:56:11,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 16:56:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2021-11-23 16:56:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 16:56:11,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:11,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 16:56:11,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:12,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:12,010 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash 28699820, now seen corresponding path program 1 times [2021-11-23 16:56:12,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:12,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873063637] [2021-11-23 16:56:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:12,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:12,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:12,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:12,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:56:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:12,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:56:12,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:12,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:12,155 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 16:56:12,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:12,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:12,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873063637] [2021-11-23 16:56:12,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873063637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:12,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:12,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:56:12,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420181727] [2021-11-23 16:56:12,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:12,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:12,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:12,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:12,164 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 16:56:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:12,542 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2021-11-23 16:56:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:12,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-23 16:56:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:12,548 INFO L225 Difference]: With dead ends: 119 [2021-11-23 16:56:12,548 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 16:56:12,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 16:56:12,550 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 51 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:12,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 105 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:56:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 16:56:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2021-11-23 16:56:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 81 states have internal predecessors, (92), 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 16:56:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-11-23 16:56:12,573 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 5 [2021-11-23 16:56:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:12,574 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-11-23 16:56:12,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 16:56:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-11-23 16:56:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 16:56:12,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:12,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 16:56:12,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:12,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:12,776 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:12,777 INFO L85 PathProgramCache]: Analyzing trace with hash 889717790, now seen corresponding path program 1 times [2021-11-23 16:56:12,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:12,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958230996] [2021-11-23 16:56:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:12,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:12,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:12,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:12,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:56:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:12,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:56:12,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:12,850 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 16:56:12,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:12,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:12,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958230996] [2021-11-23 16:56:12,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958230996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:12,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:12,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:56:12,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522792644] [2021-11-23 16:56:12,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:12,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:12,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:12,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:12,854 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 16:56:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:13,165 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2021-11-23 16:56:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-23 16:56:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:13,167 INFO L225 Difference]: With dead ends: 84 [2021-11-23 16:56:13,167 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 16:56:13,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:56:13,169 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:13,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:56:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 16:56:13,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-23 16:56:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 80 states have internal predecessors, (90), 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 16:56:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2021-11-23 16:56:13,180 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 6 [2021-11-23 16:56:13,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:13,181 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2021-11-23 16:56:13,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 16:56:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2021-11-23 16:56:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 16:56:13,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:13,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:13,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:13,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:13,395 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1286398787, now seen corresponding path program 1 times [2021-11-23 16:56:13,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:13,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553049220] [2021-11-23 16:56:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:13,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:13,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:13,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:56:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:13,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:56:13,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:13,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:13,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:13,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 16:56:13,889 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:56:13,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 16:56:13,932 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 16:56:13,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:13,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:13,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553049220] [2021-11-23 16:56:13,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553049220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:13,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:13,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:56:13,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868981047] [2021-11-23 16:56:13,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:13,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:56:13,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:13,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:56:13,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:56:13,937 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 16:56:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:14,304 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-11-23 16:56:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:56:14,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-11-23 16:56:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:14,307 INFO L225 Difference]: With dead ends: 111 [2021-11-23 16:56:14,307 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 16:56:14,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:56:14,309 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 106 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:14,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 48 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:56:14,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 16:56:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2021-11-23 16:56:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 72 states have internal predecessors, (78), 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 16:56:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-11-23 16:56:14,325 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 13 [2021-11-23 16:56:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:14,326 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-11-23 16:56:14,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 16:56:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-11-23 16:56:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:56:14,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:14,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:14,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:14,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:14,546 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:14,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1223687433, now seen corresponding path program 1 times [2021-11-23 16:56:14,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:14,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454186235] [2021-11-23 16:56:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:14,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:14,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:14,550 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:14,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:56:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:14,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:56:14,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:14,845 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 16:56:14,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:14,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:14,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454186235] [2021-11-23 16:56:14,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454186235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:14,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:14,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:56:14,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784486219] [2021-11-23 16:56:14,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:14,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:14,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:14,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:14,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:14,849 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 16:56:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:14,888 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-11-23 16:56:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:14,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2021-11-23 16:56:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:14,891 INFO L225 Difference]: With dead ends: 104 [2021-11-23 16:56:14,892 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 16:56:14,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 16:56:14,893 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 22 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:14,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:56:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 16:56:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-11-23 16:56:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 93 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2021-11-23 16:56:14,903 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 14 [2021-11-23 16:56:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:14,904 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2021-11-23 16:56:14,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 16:56:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2021-11-23 16:56:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:56:14,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:14,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:14,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:15,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:15,106 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:15,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1223656742, now seen corresponding path program 1 times [2021-11-23 16:56:15,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:15,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754728569] [2021-11-23 16:56:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:15,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:15,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:15,115 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:15,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:56:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:56:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:15,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:15,310 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 16:56:15,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:15,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754728569] [2021-11-23 16:56:15,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754728569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:15,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:15,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:56:15,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165897223] [2021-11-23 16:56:15,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:15,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:15,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:15,317 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 16:56:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:15,539 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-11-23 16:56:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:15,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2021-11-23 16:56:15,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:15,544 INFO L225 Difference]: With dead ends: 90 [2021-11-23 16:56:15,545 INFO L226 Difference]: Without dead ends: 90 [2021-11-23 16:56:15,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 16:56:15,546 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:15,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 90 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:56:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-23 16:56:15,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-23 16:56:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 89 states have internal predecessors, (102), 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 16:56:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2021-11-23 16:56:15,555 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 14 [2021-11-23 16:56:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:15,555 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2021-11-23 16:56:15,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 16:56:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2021-11-23 16:56:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:56:15,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:15,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:15,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 16:56:15,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:15,769 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:15,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1223656741, now seen corresponding path program 1 times [2021-11-23 16:56:15,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:15,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31662452] [2021-11-23 16:56:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:15,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:15,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:15,772 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:15,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:56:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:56:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:15,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:15,996 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 16:56:15,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:15,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:15,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31662452] [2021-11-23 16:56:15,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31662452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:15,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:15,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:56:15,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289950168] [2021-11-23 16:56:15,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:15,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:15,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:15,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:15,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:16,000 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 16:56:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:16,188 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-11-23 16:56:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:16,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2021-11-23 16:56:16,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:16,191 INFO L225 Difference]: With dead ends: 86 [2021-11-23 16:56:16,191 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 16:56:16,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 16:56:16,192 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:16,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 95 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:56:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 16:56:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-23 16:56:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 85 states have internal predecessors, (94), 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 16:56:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-11-23 16:56:16,199 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 14 [2021-11-23 16:56:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:16,200 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-11-23 16:56:16,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 16:56:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-11-23 16:56:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 16:56:16,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:16,201 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:16,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 16:56:16,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:16,427 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash 857288497, now seen corresponding path program 1 times [2021-11-23 16:56:16,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:16,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592498121] [2021-11-23 16:56:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:16,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:16,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:16,430 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:16,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:56:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:16,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:56:16,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:16,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:16,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:16,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:16,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592498121] [2021-11-23 16:56:16,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592498121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:16,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:16,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:56:16,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800894387] [2021-11-23 16:56:16,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:16,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:56:16,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:16,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:56:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:56:16,640 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 16:56:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:17,024 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-11-23 16:56:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:56:17,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-11-23 16:56:17,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:17,025 INFO L225 Difference]: With dead ends: 120 [2021-11-23 16:56:17,026 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 16:56:17,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 16:56:17,027 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 86 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:17,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 91 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:56:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 16:56:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 88. [2021-11-23 16:56:17,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 87 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:17,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-11-23 16:56:17,033 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 16 [2021-11-23 16:56:17,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:17,033 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-11-23 16:56:17,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 16:56:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-11-23 16:56:17,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 16:56:17,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:17,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:17,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:17,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:17,249 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:17,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:17,250 INFO L85 PathProgramCache]: Analyzing trace with hash 857288498, now seen corresponding path program 1 times [2021-11-23 16:56:17,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:17,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175465923] [2021-11-23 16:56:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:17,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:17,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:17,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:17,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:56:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:56:17,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:17,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:17,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:17,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:17,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175465923] [2021-11-23 16:56:17,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175465923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:17,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:17,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:56:17,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425723461] [2021-11-23 16:56:17,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:17,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:56:17,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:17,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:56:17,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:56:17,519 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 16:56:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:17,975 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2021-11-23 16:56:17,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:56:17,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-11-23 16:56:17,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:17,978 INFO L225 Difference]: With dead ends: 157 [2021-11-23 16:56:17,978 INFO L226 Difference]: Without dead ends: 157 [2021-11-23 16:56:17,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 16:56:17,979 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 75 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:17,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 124 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:56:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-23 16:56:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-11-23 16:56:17,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 91 states have (on average 1.4175824175824177) internal successors, (129), 109 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2021-11-23 16:56:17,988 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 16 [2021-11-23 16:56:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:17,988 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2021-11-23 16:56:17,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 16:56:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2021-11-23 16:56:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 16:56:17,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:17,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:18,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:18,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:18,203 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:18,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:18,204 INFO L85 PathProgramCache]: Analyzing trace with hash 806139317, now seen corresponding path program 1 times [2021-11-23 16:56:18,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:18,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430383293] [2021-11-23 16:56:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:18,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:18,205 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:18,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:56:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:18,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:56:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:18,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:18,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:18,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430383293] [2021-11-23 16:56:18,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430383293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:18,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1458994238] [2021-11-23 16:56:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:18,449 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:18,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:18,455 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:18,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 16:56:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:56:18,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:18,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:18,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1458994238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212727195] [2021-11-23 16:56:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:18,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:18,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:18,769 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:56:18,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 16:56:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:18,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:56:18,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:18,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:18,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212727195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:18,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:56:18,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 16:56:18,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776148074] [2021-11-23 16:56:18,993 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:56:18,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:56:18,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:56:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:56:18,995 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:19,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:19,119 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2021-11-23 16:56:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:56:19,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 16:56:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:19,121 INFO L225 Difference]: With dead ends: 146 [2021-11-23 16:56:19,121 INFO L226 Difference]: Without dead ends: 146 [2021-11-23 16:56:19,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 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 16:56:19,122 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 202 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:19,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 185 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:56:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-23 16:56:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2021-11-23 16:56:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 130 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 165 transitions. [2021-11-23 16:56:19,130 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 165 transitions. Word has length 17 [2021-11-23 16:56:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:19,131 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 165 transitions. [2021-11-23 16:56:19,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 165 transitions. [2021-11-23 16:56:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 16:56:19,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:19,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:19,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:19,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-23 16:56:19,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:19,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:19,746 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:19,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1724432386, now seen corresponding path program 1 times [2021-11-23 16:56:19,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:19,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629272367] [2021-11-23 16:56:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:19,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:19,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:19,748 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:19,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:56:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:56:19,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:19,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:56:19,969 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 16:56:19,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:20,007 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 16:56:20,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:20,151 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:56:20,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 16:56:20,231 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 16:56:20,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-11-23 16:56:20,249 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 16:56:20,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:20,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:20,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629272367] [2021-11-23 16:56:20,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629272367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:20,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:20,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:56:20,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468084794] [2021-11-23 16:56:20,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:20,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:56:20,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:56:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:56:20,254 INFO L87 Difference]: Start difference. First operand 131 states and 165 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 16:56:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:20,576 INFO L93 Difference]: Finished difference Result 200 states and 253 transitions. [2021-11-23 16:56:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:56:20,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 17 [2021-11-23 16:56:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:20,580 INFO L225 Difference]: With dead ends: 200 [2021-11-23 16:56:20,580 INFO L226 Difference]: Without dead ends: 200 [2021-11-23 16:56:20,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:56:20,581 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 46 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:20,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 199 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2021-11-23 16:56:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-23 16:56:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2021-11-23 16:56:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 124 states have (on average 1.4435483870967742) internal successors, (179), 142 states have internal predecessors, (179), 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 16:56:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2021-11-23 16:56:20,588 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 17 [2021-11-23 16:56:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:20,589 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2021-11-23 16:56:20,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 16:56:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2021-11-23 16:56:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 16:56:20,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:20,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:20,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:20,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:20,802 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:20,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1724432387, now seen corresponding path program 1 times [2021-11-23 16:56:20,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:20,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721888016] [2021-11-23 16:56:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:20,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:20,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:20,805 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:20,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:56:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 16:56:20,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:21,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:21,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:21,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:56:21,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:56:21,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:21,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:21,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:21,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:21,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:21,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:21,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:21,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:21,344 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:56:21,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-23 16:56:21,376 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:56:21,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 16:56:21,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 16:56:21,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 16:56:21,710 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 16:56:21,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 26 [2021-11-23 16:56:21,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-23 16:56:21,761 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 16:56:21,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:21,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:21,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721888016] [2021-11-23 16:56:21,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721888016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:21,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:21,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:56:21,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184877874] [2021-11-23 16:56:21,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:21,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:56:21,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:21,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:56:21,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:56:21,765 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 16:56:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:22,775 INFO L93 Difference]: Finished difference Result 194 states and 245 transitions. [2021-11-23 16:56:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:56:22,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 17 [2021-11-23 16:56:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:22,778 INFO L225 Difference]: With dead ends: 194 [2021-11-23 16:56:22,778 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 16:56:22,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:56:22,779 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:22,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 206 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 55 Unchecked, 0.9s Time] [2021-11-23 16:56:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 16:56:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 143. [2021-11-23 16:56:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 124 states have (on average 1.4274193548387097) internal successors, (177), 142 states have internal predecessors, (177), 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 16:56:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 177 transitions. [2021-11-23 16:56:22,787 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 177 transitions. Word has length 17 [2021-11-23 16:56:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:22,788 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 177 transitions. [2021-11-23 16:56:22,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 16:56:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 177 transitions. [2021-11-23 16:56:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 16:56:22,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:22,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:22,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-23 16:56:23,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:23,002 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:23,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:23,003 INFO L85 PathProgramCache]: Analyzing trace with hash -779472846, now seen corresponding path program 1 times [2021-11-23 16:56:23,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:23,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989372307] [2021-11-23 16:56:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:23,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:23,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:23,005 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:23,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:56:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:56:23,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:23,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:23,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:23,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:23,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989372307] [2021-11-23 16:56:23,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989372307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:23,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:23,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:56:23,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910396071] [2021-11-23 16:56:23,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:23,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:56:23,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:23,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:56:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:56:23,222 INFO L87 Difference]: Start difference. First operand 143 states and 177 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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 16:56:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:24,023 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2021-11-23 16:56:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:56:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2021-11-23 16:56:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:24,025 INFO L225 Difference]: With dead ends: 201 [2021-11-23 16:56:24,025 INFO L226 Difference]: Without dead ends: 201 [2021-11-23 16:56:24,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:56:24,026 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 124 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:24,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 128 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 16:56:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-23 16:56:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 161. [2021-11-23 16:56:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 142 states have (on average 1.4859154929577465) internal successors, (211), 160 states have internal predecessors, (211), 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 16:56:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 211 transitions. [2021-11-23 16:56:24,033 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 211 transitions. Word has length 18 [2021-11-23 16:56:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:24,034 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 211 transitions. [2021-11-23 16:56:24,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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 16:56:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 211 transitions. [2021-11-23 16:56:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 16:56:24,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:24,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:24,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:24,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:24,254 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash -779472845, now seen corresponding path program 1 times [2021-11-23 16:56:24,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:24,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82515644] [2021-11-23 16:56:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:24,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:24,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:24,258 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:24,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:56:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:24,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:56:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:24,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:24,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:24,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:24,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82515644] [2021-11-23 16:56:24,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82515644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:24,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:24,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:56:24,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519413846] [2021-11-23 16:56:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:24,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:56:24,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:56:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:56:24,586 INFO L87 Difference]: Start difference. First operand 161 states and 211 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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 16:56:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:25,432 INFO L93 Difference]: Finished difference Result 272 states and 360 transitions. [2021-11-23 16:56:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:56:25,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2021-11-23 16:56:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:25,435 INFO L225 Difference]: With dead ends: 272 [2021-11-23 16:56:25,435 INFO L226 Difference]: Without dead ends: 272 [2021-11-23 16:56:25,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:56:25,436 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 125 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:25,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 161 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 16:56:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-23 16:56:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 197. [2021-11-23 16:56:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 178 states have (on average 1.5561797752808988) internal successors, (277), 196 states have internal predecessors, (277), 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 16:56:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 277 transitions. [2021-11-23 16:56:25,446 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 277 transitions. Word has length 18 [2021-11-23 16:56:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:25,446 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 277 transitions. [2021-11-23 16:56:25,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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 16:56:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 277 transitions. [2021-11-23 16:56:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:56:25,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:25,448 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] [2021-11-23 16:56:25,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:25,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:25,662 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:25,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1612692029, now seen corresponding path program 1 times [2021-11-23 16:56:25,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:25,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535344355] [2021-11-23 16:56:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:25,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:25,665 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:25,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 16:56:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:25,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 16:56:25,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:25,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:25,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:56:25,950 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 16:56:25,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:26,001 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 16:56:26,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:26,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:56:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:26,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:26,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:26,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535344355] [2021-11-23 16:56:26,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535344355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:26,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:26,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:56:26,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354166799] [2021-11-23 16:56:26,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:26,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:56:26,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:56:26,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:56:26,168 INFO L87 Difference]: Start difference. First operand 197 states and 277 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 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 16:56:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:27,382 INFO L93 Difference]: Finished difference Result 296 states and 395 transitions. [2021-11-23 16:56:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 16:56:27,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 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 21 [2021-11-23 16:56:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:27,386 INFO L225 Difference]: With dead ends: 296 [2021-11-23 16:56:27,387 INFO L226 Difference]: Without dead ends: 296 [2021-11-23 16:56:27,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:56:27,388 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 150 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:27,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 238 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 16:56:27,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-23 16:56:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 207. [2021-11-23 16:56:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 188 states have (on average 1.553191489361702) internal successors, (292), 206 states have internal predecessors, (292), 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 16:56:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 292 transitions. [2021-11-23 16:56:27,400 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 292 transitions. Word has length 21 [2021-11-23 16:56:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:27,400 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 292 transitions. [2021-11-23 16:56:27,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 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 16:56:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 292 transitions. [2021-11-23 16:56:27,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:56:27,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:27,403 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] [2021-11-23 16:56:27,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:27,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:27,618 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1612692030, now seen corresponding path program 1 times [2021-11-23 16:56:27,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:27,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709818243] [2021-11-23 16:56:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:27,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:27,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:27,622 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:27,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 16:56:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:27,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:56:27,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:27,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:56:27,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:56:27,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:27,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:27,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:27,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:27,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:27,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:27,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:28,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:56:28,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-11-23 16:56:28,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:56:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:28,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:28,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709818243] [2021-11-23 16:56:28,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709818243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:28,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:28,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:56:28,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320117380] [2021-11-23 16:56:28,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:28,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:56:28,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:56:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:56:28,202 INFO L87 Difference]: Start difference. First operand 207 states and 292 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 16:56:29,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:29,314 INFO L93 Difference]: Finished difference Result 269 states and 351 transitions. [2021-11-23 16:56:29,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:56:29,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 21 [2021-11-23 16:56:29,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:29,318 INFO L225 Difference]: With dead ends: 269 [2021-11-23 16:56:29,318 INFO L226 Difference]: Without dead ends: 269 [2021-11-23 16:56:29,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:56:29,319 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 176 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:29,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 355 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 16:56:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-23 16:56:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 191. [2021-11-23 16:56:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 172 states have (on average 1.494186046511628) internal successors, (257), 190 states have internal predecessors, (257), 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 16:56:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2021-11-23 16:56:29,328 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 21 [2021-11-23 16:56:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:29,329 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2021-11-23 16:56:29,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 16:56:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2021-11-23 16:56:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 16:56:29,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:29,330 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] [2021-11-23 16:56:29,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:29,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:29,543 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1546155751, now seen corresponding path program 1 times [2021-11-23 16:56:29,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:29,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26228393] [2021-11-23 16:56:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:29,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:29,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:29,556 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:29,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:56:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:29,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:56:29,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:29,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:29,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:29,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26228393] [2021-11-23 16:56:29,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26228393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:29,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:29,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:56:29,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037787433] [2021-11-23 16:56:29,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:29,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:56:29,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:56:29,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:56:29,932 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 16:56:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:30,538 INFO L93 Difference]: Finished difference Result 221 states and 286 transitions. [2021-11-23 16:56:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:56:30,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 22 [2021-11-23 16:56:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:30,541 INFO L225 Difference]: With dead ends: 221 [2021-11-23 16:56:30,541 INFO L226 Difference]: Without dead ends: 221 [2021-11-23 16:56:30,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:56:30,542 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 247 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:30,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 139 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 16:56:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-23 16:56:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 200. [2021-11-23 16:56:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 181 states have (on average 1.5303867403314917) internal successors, (277), 199 states have internal predecessors, (277), 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 16:56:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 277 transitions. [2021-11-23 16:56:30,551 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 277 transitions. Word has length 22 [2021-11-23 16:56:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:30,551 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 277 transitions. [2021-11-23 16:56:30,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 16:56:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 277 transitions. [2021-11-23 16:56:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 16:56:30,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:30,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 16:56:30,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:30,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:30,767 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:30,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:30,767 INFO L85 PathProgramCache]: Analyzing trace with hash 858860942, now seen corresponding path program 1 times [2021-11-23 16:56:30,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:30,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693118087] [2021-11-23 16:56:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:30,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:30,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:30,770 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:30,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 16:56:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:31,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:56:31,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:31,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:31,144 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 16:56:31,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-23 16:56:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:31,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:31,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:31,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693118087] [2021-11-23 16:56:31,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693118087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:31,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1322185469] [2021-11-23 16:56:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:31,319 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:31,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:31,320 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:31,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 16:56:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:31,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:56:31,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:31,661 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 16:56:31,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 16:56:31,911 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-23 16:56:31,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2021-11-23 16:56:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:32,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:32,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1322185469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:32,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102922908] [2021-11-23 16:56:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:32,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:32,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:32,222 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:56:32,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 16:56:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:56:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:32,392 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 16:56:32,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-23 16:56:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:32,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:32,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102922908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:32,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:56:32,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2021-11-23 16:56:32,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579443793] [2021-11-23 16:56:32,528 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:56:32,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:56:32,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:32,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:56:32,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:56:32,529 INFO L87 Difference]: Start difference. First operand 200 states and 277 transitions. Second operand has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 7 states have internal predecessors, (53), 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 16:56:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:32,757 INFO L93 Difference]: Finished difference Result 216 states and 293 transitions. [2021-11-23 16:56:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:56:32,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 7 states have internal predecessors, (53), 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 25 [2021-11-23 16:56:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:32,759 INFO L225 Difference]: With dead ends: 216 [2021-11-23 16:56:32,759 INFO L226 Difference]: Without dead ends: 216 [2021-11-23 16:56:32,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:56:32,760 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:32,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 184 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2021-11-23 16:56:32,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-23 16:56:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 203. [2021-11-23 16:56:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 184 states have (on average 1.5217391304347827) internal successors, (280), 202 states have internal predecessors, (280), 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 16:56:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 280 transitions. [2021-11-23 16:56:32,766 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 280 transitions. Word has length 25 [2021-11-23 16:56:32,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:32,766 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 280 transitions. [2021-11-23 16:56:32,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 7 states have internal predecessors, (53), 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 16:56:32,767 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 280 transitions. [2021-11-23 16:56:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 16:56:32,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:32,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 16:56:32,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:32,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:33,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:33,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:33,380 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash 858860943, now seen corresponding path program 1 times [2021-11-23 16:56:33,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:33,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695951282] [2021-11-23 16:56:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:33,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:33,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:33,381 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:33,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 16:56:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:33,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:56:33,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:33,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:33,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:33,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:33,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 16:56:33,746 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:56:33,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 16:56:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:33,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:34,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:34,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695951282] [2021-11-23 16:56:34,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695951282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:34,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [106454199] [2021-11-23 16:56:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:34,687 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:34,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:34,690 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:34,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 16:56:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:35,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:56:35,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:35,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:35,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:35,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 16:56:35,305 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:56:35,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 16:56:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:35,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:38,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [106454199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:38,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35218832] [2021-11-23 16:56:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:38,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:38,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:38,237 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:56:38,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 16:56:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:38,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:56:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:38,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:38,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:38,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 16:56:38,591 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:56:38,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 16:56:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:38,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:41,383 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 16:56:41,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-11-23 16:56:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:43,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35218832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:43,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:56:43,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 9 [2021-11-23 16:56:43,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655203855] [2021-11-23 16:56:43,582 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:56:43,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 16:56:43,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:43,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 16:56:43,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2021-11-23 16:56:43,583 INFO L87 Difference]: Start difference. First operand 203 states and 280 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:44,168 INFO L93 Difference]: Finished difference Result 252 states and 329 transitions. [2021-11-23 16:56:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:56:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 16:56:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:44,171 INFO L225 Difference]: With dead ends: 252 [2021-11-23 16:56:44,171 INFO L226 Difference]: Without dead ends: 252 [2021-11-23 16:56:44,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=61, Invalid=120, Unknown=1, NotChecked=0, Total=182 [2021-11-23 16:56:44,172 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 296 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:44,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 112 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 101 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2021-11-23 16:56:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-23 16:56:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 203. [2021-11-23 16:56:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 184 states have (on average 1.5108695652173914) internal successors, (278), 202 states have internal predecessors, (278), 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 16:56:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 278 transitions. [2021-11-23 16:56:44,180 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 278 transitions. Word has length 25 [2021-11-23 16:56:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:44,180 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 278 transitions. [2021-11-23 16:56:44,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 278 transitions. [2021-11-23 16:56:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 16:56:44,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:44,181 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] [2021-11-23 16:56:44,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:44,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:44,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-23 16:56:44,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:44,782 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:44,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1822218349, now seen corresponding path program 1 times [2021-11-23 16:56:44,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:44,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133288962] [2021-11-23 16:56:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:44,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:44,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:44,784 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:44,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 16:56:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:44,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:56:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:45,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:49,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:49,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133288962] [2021-11-23 16:56:49,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133288962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:49,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1080995785] [2021-11-23 16:56:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:49,643 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:49,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:49,648 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:49,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 16:56:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:49,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:56:49,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:50,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:50,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1080995785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172661973] [2021-11-23 16:56:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:50,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:50,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:50,800 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:56:50,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 16:56:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:50,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:56:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:51,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 20 [2021-11-23 16:56:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:51,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:55,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172661973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:55,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:56:55,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 6, 6, 6] total 16 [2021-11-23 16:56:55,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703928918] [2021-11-23 16:56:55,461 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:56:55,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:56:55,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:56:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=190, Unknown=2, NotChecked=0, Total=240 [2021-11-23 16:56:55,462 INFO L87 Difference]: Start difference. First operand 203 states and 278 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 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 16:56:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:55,670 INFO L93 Difference]: Finished difference Result 205 states and 279 transitions. [2021-11-23 16:56:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:56:55,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 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 26 [2021-11-23 16:56:55,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:55,672 INFO L225 Difference]: With dead ends: 205 [2021-11-23 16:56:55,672 INFO L226 Difference]: Without dead ends: 196 [2021-11-23 16:56:55,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 130 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=54, Invalid=216, Unknown=2, NotChecked=0, Total=272 [2021-11-23 16:56:55,674 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:55,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 233 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2021-11-23 16:56:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-23 16:56:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-11-23 16:56:55,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 177 states have (on average 1.5254237288135593) internal successors, (270), 195 states have internal predecessors, (270), 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 16:56:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 270 transitions. [2021-11-23 16:56:55,681 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 270 transitions. Word has length 26 [2021-11-23 16:56:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:55,681 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 270 transitions. [2021-11-23 16:56:55,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 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 16:56:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 270 transitions. [2021-11-23 16:56:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 16:56:55,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:55,682 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] [2021-11-23 16:56:55,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:55,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:56,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-23 16:56:56,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:56,283 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:56:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash -535670236, now seen corresponding path program 1 times [2021-11-23 16:56:56,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370328506] [2021-11-23 16:56:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:56,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:56,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:56,285 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:56,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 16:56:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:56:56,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:56,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:56,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:56,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 16:56:56,679 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:56:56,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 16:56:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:56,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:57,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370328506] [2021-11-23 16:56:57,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370328506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551554016] [2021-11-23 16:56:57,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:57,578 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:57,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:57,582 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:57,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-23 16:56:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:57,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:56:57,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:57,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:57,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:58,081 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:56:58,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 16:56:58,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 16:56:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:58,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:58,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551554016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:58,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093479398] [2021-11-23 16:56:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:58,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:58,949 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:56:58,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 16:56:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:59,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 16:56:59,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:59,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:56:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:56:59,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:56:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:59,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:59,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:59,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:59,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:59,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:59,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:56:59,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:56:59,355 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:56:59,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-23 16:56:59,375 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:56:59,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 16:56:59,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 16:56:59,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 16:56:59,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-23 16:56:59,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-23 16:56:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:59,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:08,617 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 16:57:08,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-11-23 16:57:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:13,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093479398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:13,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:57:13,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 4, 9, 10] total 20 [2021-11-23 16:57:13,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101726178] [2021-11-23 16:57:13,146 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:57:13,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 16:57:13,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 16:57:13,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=303, Unknown=3, NotChecked=0, Total=420 [2021-11-23 16:57:13,147 INFO L87 Difference]: Start difference. First operand 196 states and 270 transitions. Second operand has 21 states, 20 states have (on average 4.5) internal successors, (90), 21 states have internal predecessors, (90), 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 16:57:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:15,712 INFO L93 Difference]: Finished difference Result 270 states and 347 transitions. [2021-11-23 16:57:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 16:57:15,716 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.5) internal successors, (90), 21 states have internal predecessors, (90), 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 28 [2021-11-23 16:57:15,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:15,718 INFO L225 Difference]: With dead ends: 270 [2021-11-23 16:57:15,718 INFO L226 Difference]: Without dead ends: 270 [2021-11-23 16:57:15,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=305, Invalid=684, Unknown=3, NotChecked=0, Total=992 [2021-11-23 16:57:15,720 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 268 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:15,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 395 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 513 Invalid, 0 Unknown, 73 Unchecked, 1.9s Time] [2021-11-23 16:57:15,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-23 16:57:15,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 212. [2021-11-23 16:57:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 193 states have (on average 1.4870466321243523) internal successors, (287), 211 states have internal predecessors, (287), 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 16:57:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 287 transitions. [2021-11-23 16:57:15,728 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 287 transitions. Word has length 28 [2021-11-23 16:57:15,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:15,728 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 287 transitions. [2021-11-23 16:57:15,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.5) internal successors, (90), 21 states have internal predecessors, (90), 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 16:57:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 287 transitions. [2021-11-23 16:57:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 16:57:15,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:15,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:57:15,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:15,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:16,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:16,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:16,355 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:57:16,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1492384592, now seen corresponding path program 1 times [2021-11-23 16:57:16,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:16,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846565693] [2021-11-23 16:57:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:16,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:16,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:16,357 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:16,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 16:57:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:16,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:57:16,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:16,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:16,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:16,813 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-11-23 16:57:16,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-11-23 16:57:16,976 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:57:16,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2021-11-23 16:57:17,075 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 16:57:17,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-11-23 16:57:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:17,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:17,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:17,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846565693] [2021-11-23 16:57:17,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846565693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:17,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1332785240] [2021-11-23 16:57:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:17,308 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:17,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:17,310 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:17,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-23 16:57:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:57:17,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:17,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:17,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:17,838 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-11-23 16:57:17,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-11-23 16:57:17,921 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:57:17,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2021-11-23 16:57:17,982 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 16:57:17,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-11-23 16:57:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:17,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:18,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1332785240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:18,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803166130] [2021-11-23 16:57:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:18,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:18,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:18,148 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:57:18,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 16:57:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:18,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:57:18,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:18,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:18,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:18,415 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-23 16:57:18,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2021-11-23 16:57:18,581 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:57:18,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-23 16:57:18,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-11-23 16:57:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:18,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:18,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803166130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:18,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:57:18,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 12 [2021-11-23 16:57:18,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032906878] [2021-11-23 16:57:18,830 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:57:18,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 16:57:18,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 16:57:18,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:57:18,832 INFO L87 Difference]: Start difference. First operand 212 states and 287 transitions. Second operand has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 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 16:57:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:20,213 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2021-11-23 16:57:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:57:20,214 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 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 29 [2021-11-23 16:57:20,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:20,216 INFO L225 Difference]: With dead ends: 231 [2021-11-23 16:57:20,216 INFO L226 Difference]: Without dead ends: 231 [2021-11-23 16:57:20,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 139 SyntacticMatches, 18 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:57:20,217 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:20,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 273 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 3 Unchecked, 1.1s Time] [2021-11-23 16:57:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-23 16:57:20,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 211. [2021-11-23 16:57:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 193 states have (on average 1.4766839378238341) internal successors, (285), 210 states have internal predecessors, (285), 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 16:57:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 285 transitions. [2021-11-23 16:57:20,226 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 285 transitions. Word has length 29 [2021-11-23 16:57:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:20,226 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 285 transitions. [2021-11-23 16:57:20,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 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 16:57:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 285 transitions. [2021-11-23 16:57:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 16:57:20,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:20,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:57:20,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:20,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:20,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:20,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:20,842 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:57:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1492384593, now seen corresponding path program 1 times [2021-11-23 16:57:20,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:20,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423410609] [2021-11-23 16:57:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:20,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:20,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:20,845 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:20,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 16:57:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:21,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 16:57:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:21,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:21,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:21,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:21,457 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 16:57:21,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 16:57:21,673 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:57:21,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 16:57:21,725 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:57:21,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 16:57:21,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 16:57:21,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:57:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:21,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:22,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:22,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423410609] [2021-11-23 16:57:22,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423410609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:22,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1998948109] [2021-11-23 16:57:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:22,955 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:22,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:22,956 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:22,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 16:57:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:23,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 16:57:23,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:23,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:23,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:23,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:23,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:23,664 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-23 16:57:23,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 16:57:23,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 16:57:23,919 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:57:23,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 16:57:23,966 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:57:23,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-11-23 16:57:24,125 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 16:57:24,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-11-23 16:57:24,138 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 16:57:24,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-23 16:57:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:24,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:25,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1998948109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:25,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902832931] [2021-11-23 16:57:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:25,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:25,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:25,376 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:57:25,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 16:57:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:25,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:57:25,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:25,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:25,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:25,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:25,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:25,930 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-23 16:57:25,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-11-23 16:57:25,968 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-23 16:57:25,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 16:57:26,169 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:57:26,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-11-23 16:57:26,219 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 16:57:26,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 16:57:26,308 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 16:57:26,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-11-23 16:57:26,319 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 16:57:26,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-23 16:57:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:26,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:27,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902832931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:27,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:57:27,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 20 [2021-11-23 16:57:27,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256148795] [2021-11-23 16:57:27,248 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:57:27,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 16:57:27,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 16:57:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-23 16:57:27,249 INFO L87 Difference]: Start difference. First operand 211 states and 285 transitions. Second operand has 21 states, 20 states have (on average 3.95) internal successors, (79), 21 states have internal predecessors, (79), 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 16:57:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:28,555 INFO L93 Difference]: Finished difference Result 224 states and 291 transitions. [2021-11-23 16:57:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:57:28,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.95) internal successors, (79), 21 states have internal predecessors, (79), 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 29 [2021-11-23 16:57:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:28,558 INFO L225 Difference]: With dead ends: 224 [2021-11-23 16:57:28,559 INFO L226 Difference]: Without dead ends: 224 [2021-11-23 16:57:28,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-11-23 16:57:28,560 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 136 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:28,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 501 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 270 Unchecked, 0.8s Time] [2021-11-23 16:57:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-23 16:57:28,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 198. [2021-11-23 16:57:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 181 states have (on average 1.4972375690607735) internal successors, (271), 197 states have internal predecessors, (271), 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 16:57:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 271 transitions. [2021-11-23 16:57:28,568 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 271 transitions. Word has length 29 [2021-11-23 16:57:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:28,568 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 271 transitions. [2021-11-23 16:57:28,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.95) internal successors, (79), 21 states have internal predecessors, (79), 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 16:57:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 271 transitions. [2021-11-23 16:57:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 16:57:28,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:28,570 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] [2021-11-23 16:57:28,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-11-23 16:57:28,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:29,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:29,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:29,189 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:57:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:29,190 INFO L85 PathProgramCache]: Analyzing trace with hash 616980133, now seen corresponding path program 1 times [2021-11-23 16:57:29,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:29,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040435941] [2021-11-23 16:57:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:29,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:29,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:29,192 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:29,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 16:57:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:57:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:57:29,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:57:29,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:29,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040435941] [2021-11-23 16:57:29,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040435941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:57:29,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:57:29,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:57:29,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168351795] [2021-11-23 16:57:29,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:57:29,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:57:29,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:29,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:57:29,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:57:29,569 INFO L87 Difference]: Start difference. First operand 198 states and 271 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 16:57:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:30,112 INFO L93 Difference]: Finished difference Result 213 states and 272 transitions. [2021-11-23 16:57:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:57:30,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 30 [2021-11-23 16:57:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:30,114 INFO L225 Difference]: With dead ends: 213 [2021-11-23 16:57:30,115 INFO L226 Difference]: Without dead ends: 213 [2021-11-23 16:57:30,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:57:30,116 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 131 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:30,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 107 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:57:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-23 16:57:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 164. [2021-11-23 16:57:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 147 states have (on average 1.4557823129251701) internal successors, (214), 163 states have internal predecessors, (214), 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 16:57:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 214 transitions. [2021-11-23 16:57:30,123 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 214 transitions. Word has length 30 [2021-11-23 16:57:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:30,123 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 214 transitions. [2021-11-23 16:57:30,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 16:57:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 214 transitions. [2021-11-23 16:57:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 16:57:30,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:30,125 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] [2021-11-23 16:57:30,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:30,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:57:30,338 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:57:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2004836725, now seen corresponding path program 1 times [2021-11-23 16:57:30,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:30,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781499500] [2021-11-23 16:57:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:30,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:30,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:30,341 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:30,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 16:57:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:57:30,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:30,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:30,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:30,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-23 16:57:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:30,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:57:30,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:30,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781499500] [2021-11-23 16:57:30,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781499500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:57:30,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:57:30,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:57:30,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525014531] [2021-11-23 16:57:30,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:57:30,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:57:30,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:30,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:57:30,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:57:30,786 INFO L87 Difference]: Start difference. First operand 164 states and 214 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 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 16:57:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:31,980 INFO L93 Difference]: Finished difference Result 194 states and 236 transitions. [2021-11-23 16:57:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 16:57:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 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 33 [2021-11-23 16:57:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:31,982 INFO L225 Difference]: With dead ends: 194 [2021-11-23 16:57:31,982 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 16:57:31,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-23 16:57:31,983 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 89 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:31,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 187 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 16:57:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 16:57:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 166. [2021-11-23 16:57:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 149 states have (on average 1.4630872483221478) internal successors, (218), 165 states have internal predecessors, (218), 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 16:57:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 218 transitions. [2021-11-23 16:57:31,990 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 218 transitions. Word has length 33 [2021-11-23 16:57:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:31,990 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 218 transitions. [2021-11-23 16:57:31,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 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 16:57:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 218 transitions. [2021-11-23 16:57:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 16:57:31,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:31,991 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] [2021-11-23 16:57:32,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:32,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:57:32,207 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:57:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2004836724, now seen corresponding path program 1 times [2021-11-23 16:57:32,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:32,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604667118] [2021-11-23 16:57:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:32,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:32,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:32,209 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:32,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 16:57:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:32,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:57:32,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:32,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:32,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:32,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:32,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:57:32,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 16:57:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:32,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:57:32,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:32,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604667118] [2021-11-23 16:57:32,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604667118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:57:32,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:57:32,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:57:32,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431624806] [2021-11-23 16:57:32,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:57:32,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:57:32,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:32,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:57:32,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:57:32,820 INFO L87 Difference]: Start difference. First operand 166 states and 218 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 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 16:57:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:34,076 INFO L93 Difference]: Finished difference Result 191 states and 232 transitions. [2021-11-23 16:57:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:57:34,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 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 33 [2021-11-23 16:57:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:34,078 INFO L225 Difference]: With dead ends: 191 [2021-11-23 16:57:34,078 INFO L226 Difference]: Without dead ends: 191 [2021-11-23 16:57:34,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:57:34,078 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 91 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:34,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 249 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 16:57:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-23 16:57:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 166. [2021-11-23 16:57:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 149 states have (on average 1.4563758389261745) internal successors, (217), 165 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 16:57:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 217 transitions. [2021-11-23 16:57:34,083 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 217 transitions. Word has length 33 [2021-11-23 16:57:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:34,084 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 217 transitions. [2021-11-23 16:57:34,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 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 16:57:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 217 transitions. [2021-11-23 16:57:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 16:57:34,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:34,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:57:34,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:34,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:57:34,298 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:57:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:34,298 INFO L85 PathProgramCache]: Analyzing trace with hash -161860525, now seen corresponding path program 1 times [2021-11-23 16:57:34,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:34,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885569066] [2021-11-23 16:57:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:34,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:34,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:34,300 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:34,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 16:57:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 16:57:34,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:34,615 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-23 16:57:34,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2021-11-23 16:57:34,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:34,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:34,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:34,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:34,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:34,991 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-11-23 16:57:34,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 35 [2021-11-23 16:57:35,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:35,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:35,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:35,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:35,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:35,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:35,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:35,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:35,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:57:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:35,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:36,009 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-11-23 16:57:36,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-11-23 16:57:36,028 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2092 (_ BitVec 32)) (v_ArrVal_2093 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~last~0#1.base|) (bvadd |c_ULTIMATE.start_main_~last~0#1.offset| (_ bv12 32)) v_ArrVal_2092)) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2093) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|) |c_ULTIMATE.start_main_~last~0#1.base|)) is different from false [2021-11-23 16:57:36,090 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2092 (_ BitVec 32)) (v_ArrVal_2090 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2093 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2090))) (store .cse0 |c_ULTIMATE.start_main_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~last~0#1.base|) (bvadd |c_ULTIMATE.start_main_~last~0#1.offset| (_ bv12 32)) v_ArrVal_2092))) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2093) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|) |c_ULTIMATE.start_main_~last~0#1.base|)) is different from false [2021-11-23 16:57:36,310 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_59| (_ BitVec 32)) (v_ArrVal_2092 (_ BitVec 32)) (v_ArrVal_2090 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2093 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select (store (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_59| v_ArrVal_2090))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2092))) |v_ULTIMATE.start_main_~x~0#1.base_59| v_ArrVal_2093) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_59|)))))) is different from false [2021-11-23 16:57:36,393 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_59| (_ BitVec 32)) (v_ArrVal_2092 (_ BitVec 32)) (v_ArrVal_2084 (_ BitVec 32)) (v_ArrVal_2090 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2093 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select (store (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_2084)) |v_ULTIMATE.start_main_~x~0#1.base_59| v_ArrVal_2090))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2092))) |v_ULTIMATE.start_main_~x~0#1.base_59| v_ArrVal_2093) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_59|)))))) is different from false [2021-11-23 16:57:36,433 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_59| (_ BitVec 32)) (v_ArrVal_2092 (_ BitVec 32)) (v_ArrVal_2083 (_ BitVec 32)) (v_ArrVal_2084 (_ BitVec 32)) (v_ArrVal_2090 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2093 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select (store (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_2083) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_2084)) |v_ULTIMATE.start_main_~x~0#1.base_59| v_ArrVal_2090))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2092))) |v_ULTIMATE.start_main_~x~0#1.base_59| v_ArrVal_2093) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_59|)))))) is different from false [2021-11-23 16:57:36,528 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-11-23 16:57:36,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2021-11-23 16:57:36,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2021-11-23 16:57:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:57:36,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 16:57:36,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 16:57:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-11-23 16:57:36,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:36,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885569066] [2021-11-23 16:57:36,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885569066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:36,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [977199982] [2021-11-23 16:57:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:36,631 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:36,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:36,646 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:36,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-23 16:57:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:37,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 16:57:37,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:37,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:57:37,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:37,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:37,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:37,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:37,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:37,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:37,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:37,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:37,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:37,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:37,636 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:57:37,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 16:57:37,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:37,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:37,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:37,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:37,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:37,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:37,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:37,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:37,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:37,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:38,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:38,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:38,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:38,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:38,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:38,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:38,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:57:38,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-11-23 16:57:38,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:57:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:38,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:39,044 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2197 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~first~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2197) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|))) (forall ((v_ArrVal_2198 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~first~0#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2198) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|)))) is different from false [2021-11-23 16:57:39,072 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2197 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2194 (_ BitVec 32))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~last~0#1.base|) (bvadd |c_ULTIMATE.start_main_~last~0#1.offset| (_ bv12 32)) v_ArrVal_2194)) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2197) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|) |c_ULTIMATE.start_main_~first~0#1.base|)) (forall ((v_ArrVal_2198 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2195 (_ BitVec 32))) (= |c_ULTIMATE.start_main_~first~0#1.offset| (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~last~0#1.base|) (bvadd |c_ULTIMATE.start_main_~last~0#1.offset| (_ bv12 32)) v_ArrVal_2195)) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2198) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|)))) is different from false [2021-11-23 16:57:39,165 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2198 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2195 (_ BitVec 32)) (v_ArrVal_2192 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~first~0#1.offset| (select (select (store (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2192))) (store .cse0 |c_ULTIMATE.start_main_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~last~0#1.base|) (bvadd |c_ULTIMATE.start_main_~last~0#1.offset| (_ bv12 32)) v_ArrVal_2195))) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2198) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|))) (forall ((v_ArrVal_2197 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2194 (_ BitVec 32)) (v_ArrVal_2191 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~first~0#1.base| (select (select (store (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2191))) (store .cse1 |c_ULTIMATE.start_main_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~last~0#1.base|) (bvadd |c_ULTIMATE.start_main_~last~0#1.offset| (_ bv12 32)) v_ArrVal_2194))) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2197) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|)))) is different from false [2021-11-23 16:57:39,903 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_61| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_61|)))) (and (forall ((v_ArrVal_2198 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2195 (_ BitVec 32)) (v_ArrVal_2192 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (let ((.cse0 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~x~0#1.base_61| v_ArrVal_2192))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2195))) |v_ULTIMATE.start_main_~x~0#1.base_61| v_ArrVal_2198) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (forall ((v_ArrVal_2197 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2194 (_ BitVec 32)) (v_ArrVal_2191 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select (store (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_61| v_ArrVal_2191))) (store .cse1 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2194))) |v_ULTIMATE.start_main_~x~0#1.base_61| v_ArrVal_2197) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)))))) is different from false [2021-11-23 16:57:40,901 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-23 16:57:40,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 98 [2021-11-23 16:57:40,971 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-23 16:57:40,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 90 [2021-11-23 16:57:40,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 120 [2021-11-23 16:57:40,995 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:57:40,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 124 [2021-11-23 16:57:41,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 154 [2021-11-23 16:57:41,023 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:57:41,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 158 [2021-11-23 16:57:41,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 109 [2021-11-23 16:57:41,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-11-23 16:57:41,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-11-23 16:57:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-11-23 16:57:41,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [977199982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:41,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196609685] [2021-11-23 16:57:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:41,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:41,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:41,102 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:57:41,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 16:57:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:41,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 16:57:41,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:41,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:57:41,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:41,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:41,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:41,954 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:57:41,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 16:57:42,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:42,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:42,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:42,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:42,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:42,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:57:42,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 16:57:42,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:57:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:42,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:42,434 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2288 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2288) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|))))))))) (_ bv1 1)))) is different from false [2021-11-23 16:57:42,473 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-11-23 16:57:42,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-11-23 16:57:42,488 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2288 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2287 (_ BitVec 32))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~last~0#1.base|) (bvadd |c_ULTIMATE.start_main_~last~0#1.offset| (_ bv12 32)) v_ArrVal_2287)) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2288) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|) |c_ULTIMATE.start_main_~last~0#1.base|)) is different from false [2021-11-23 16:57:42,535 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2288 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2287 (_ BitVec 32))) (= (select (select (store (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2285))) (store .cse0 |c_ULTIMATE.start_main_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~last~0#1.base|) (bvadd |c_ULTIMATE.start_main_~last~0#1.offset| (_ bv12 32)) v_ArrVal_2287))) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2288) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|) |c_ULTIMATE.start_main_~last~0#1.base|)) is different from false [2021-11-23 16:57:42,635 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_63| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_63|)))) (forall ((v_ArrVal_2285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2288 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2287 (_ BitVec 32))) (= (select (select (store (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_63| v_ArrVal_2285))) (store .cse0 |c_ULTIMATE.start_main_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~last~0#1.base|) (bvadd |c_ULTIMATE.start_main_~last~0#1.offset| (_ bv12 32)) v_ArrVal_2287))) |v_ULTIMATE.start_main_~x~0#1.base_63| v_ArrVal_2288) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|) |c_ULTIMATE.start_main_~last~0#1.base|)))) is different from false [2021-11-23 16:57:42,661 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2288 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2287 (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1.base_63| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_63|)))) (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select (store (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_63| v_ArrVal_2285))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2287))) |v_ULTIMATE.start_main_~x~0#1.base_63| v_ArrVal_2288) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)))) is different from false [2021-11-23 16:57:42,775 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2279 (_ BitVec 32)) (v_ArrVal_2285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2288 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2287 (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1.base_63| (_ BitVec 32))) (or (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select (store (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_2279)) |v_ULTIMATE.start_main_~x~0#1.base_63| v_ArrVal_2285))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2287))) |v_ULTIMATE.start_main_~x~0#1.base_63| v_ArrVal_2288) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_63|)))))) is different from false [2021-11-23 16:57:42,816 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2279 (_ BitVec 32)) (v_ArrVal_2285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2288 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2287 (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1.base_63| (_ BitVec 32)) (v_ArrVal_2278 (_ BitVec 32))) (or (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select (store (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_2278) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_2279)) |v_ULTIMATE.start_main_~x~0#1.base_63| v_ArrVal_2285))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2287))) |v_ULTIMATE.start_main_~x~0#1.base_63| v_ArrVal_2288) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_63|)))))) is different from false [2021-11-23 16:57:42,927 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-11-23 16:57:42,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2021-11-23 16:57:42,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2021-11-23 16:57:42,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:57:42,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 16:57:42,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 16:57:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-23 16:57:42,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196609685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:42,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:57:42,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11, 13, 11, 13] total 51 [2021-11-23 16:57:42,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968115808] [2021-11-23 16:57:42,963 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:57:42,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 16:57:42,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 16:57:42,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1061, Unknown=47, NotChecked=1296, Total=2550 [2021-11-23 16:57:42,966 INFO L87 Difference]: Start difference. First operand 166 states and 217 transitions. Second operand has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 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 16:57:43,728 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~x~0#1.base|)))) (.cse0 (= (_ bv0 1) (select |c_#valid| (_ bv0 32))))) (and (or (= |c_ULTIMATE.start_main_~x~0#1.base| (_ bv0 32)) .cse0) (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (= |c_ULTIMATE.start_main_~x~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (forall ((|v_ULTIMATE.start_main_~x~0#1.base_59| (_ BitVec 32)) (v_ArrVal_2092 (_ BitVec 32)) (v_ArrVal_2090 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2093 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select (store (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_59| v_ArrVal_2090))) (store .cse1 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2092))) |v_ULTIMATE.start_main_~x~0#1.base_59| v_ArrVal_2093) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_59|)))))) (= (_ bv0 1) (bvadd (bvneg .cse2) (_ bv1 1))) (forall ((v_ArrVal_2285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2288 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2287 (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1.base_63| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_63|)))) (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select (store (let ((.cse3 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_63| v_ArrVal_2285))) (store .cse3 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2287))) |v_ULTIMATE.start_main_~x~0#1.base_63| v_ArrVal_2288) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)))) (= (_ bv0 1) (bvadd .cse2 (_ bv1 1))) .cse0 (= |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_main_~x~0#1.base_61| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_61|)))) (and (forall ((v_ArrVal_2198 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2195 (_ BitVec 32)) (v_ArrVal_2192 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (let ((.cse4 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~x~0#1.base_61| v_ArrVal_2192))) (store .cse4 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse4 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2195))) |v_ULTIMATE.start_main_~x~0#1.base_61| v_ArrVal_2198) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (forall ((v_ArrVal_2197 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2194 (_ BitVec 32)) (v_ArrVal_2191 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~x~0#1.base| (select (select (store (let ((.cse5 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_61| v_ArrVal_2191))) (store .cse5 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse5 |c_ULTIMATE.start_main_~x~0#1.base|) (bvadd |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv12 32)) v_ArrVal_2194))) |v_ULTIMATE.start_main_~x~0#1.base_61| v_ArrVal_2197) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)))))))) is different from false [2021-11-23 16:57:54,237 WARN L227 SmtUtils]: Spent 10.28s on a formula simplification. DAG size of input: 98 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:58:26,409 WARN L227 SmtUtils]: Spent 18.09s on a formula simplification. DAG size of input: 51 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:58:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:34,315 INFO L93 Difference]: Finished difference Result 206 states and 254 transitions. [2021-11-23 16:58:34,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 16:58:34,316 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 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 35 [2021-11-23 16:58:34,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:34,317 INFO L225 Difference]: With dead ends: 206 [2021-11-23 16:58:34,317 INFO L226 Difference]: Without dead ends: 206 [2021-11-23 16:58:34,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 155 SyntacticMatches, 13 SemanticMatches, 69 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=362, Invalid=2502, Unknown=66, NotChecked=2040, Total=4970 [2021-11-23 16:58:34,320 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 122 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1409 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:34,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1194 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 857 Invalid, 0 Unknown, 1409 Unchecked, 2.2s Time] [2021-11-23 16:58:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-23 16:58:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 186. [2021-11-23 16:58:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 169 states have (on average 1.4142011834319526) internal successors, (239), 185 states have internal predecessors, (239), 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 16:58:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 239 transitions. [2021-11-23 16:58:34,326 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 239 transitions. Word has length 35 [2021-11-23 16:58:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:34,327 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 239 transitions. [2021-11-23 16:58:34,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 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 16:58:34,327 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 239 transitions. [2021-11-23 16:58:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 16:58:34,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:34,328 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] [2021-11-23 16:58:34,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:34,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-23 16:58:34,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-11-23 16:58:34,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:34,943 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:58:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:34,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1792226092, now seen corresponding path program 1 times [2021-11-23 16:58:34,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642479990] [2021-11-23 16:58:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:34,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:34,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:34,945 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:34,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 16:58:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:35,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:58:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:35,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:58:35,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:58:35,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-23 16:58:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:35,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:58:35,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:35,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642479990] [2021-11-23 16:58:35,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642479990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:58:35,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:58:35,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:58:35,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231894992] [2021-11-23 16:58:35,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:58:35,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:58:35,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:35,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:58:35,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:58:35,553 INFO L87 Difference]: Start difference. First operand 186 states and 239 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 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 16:58:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:37,129 INFO L93 Difference]: Finished difference Result 235 states and 285 transitions. [2021-11-23 16:58:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 16:58:37,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 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 35 [2021-11-23 16:58:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:37,131 INFO L225 Difference]: With dead ends: 235 [2021-11-23 16:58:37,131 INFO L226 Difference]: Without dead ends: 235 [2021-11-23 16:58:37,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:58:37,132 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 115 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:37,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 216 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 16:58:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-23 16:58:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 187. [2021-11-23 16:58:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 171 states have (on average 1.3976608187134503) internal successors, (239), 186 states have internal predecessors, (239), 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 16:58:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 239 transitions. [2021-11-23 16:58:37,139 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 239 transitions. Word has length 35 [2021-11-23 16:58:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:37,140 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 239 transitions. [2021-11-23 16:58:37,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 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 16:58:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 239 transitions. [2021-11-23 16:58:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 16:58:37,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:37,141 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] [2021-11-23 16:58:37,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-11-23 16:58:37,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:58:37,342 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:58:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:37,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1792226093, now seen corresponding path program 1 times [2021-11-23 16:58:37,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:37,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147798760] [2021-11-23 16:58:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:37,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:37,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:37,343 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:37,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 16:58:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:37,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 16:58:37,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:37,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:58:37,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:58:37,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:58:37,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:58:37,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 16:58:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:38,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:58:38,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:38,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147798760] [2021-11-23 16:58:38,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147798760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:58:38,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:58:38,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:58:38,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625324345] [2021-11-23 16:58:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:58:38,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:58:38,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:58:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:58:38,037 INFO L87 Difference]: Start difference. First operand 187 states and 239 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 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 16:58:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:39,798 INFO L93 Difference]: Finished difference Result 228 states and 272 transitions. [2021-11-23 16:58:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:58:39,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 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 35 [2021-11-23 16:58:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:39,800 INFO L225 Difference]: With dead ends: 228 [2021-11-23 16:58:39,800 INFO L226 Difference]: Without dead ends: 228 [2021-11-23 16:58:39,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:58:39,801 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 135 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:39,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 256 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 16:58:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-23 16:58:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 189. [2021-11-23 16:58:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 173 states have (on average 1.393063583815029) internal successors, (241), 188 states have internal predecessors, (241), 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 16:58:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 241 transitions. [2021-11-23 16:58:39,804 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 241 transitions. Word has length 35 [2021-11-23 16:58:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:39,804 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 241 transitions. [2021-11-23 16:58:39,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 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 16:58:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 241 transitions. [2021-11-23 16:58:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 16:58:39,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:39,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:58:39,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-11-23 16:58:40,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:58:40,006 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:58:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:40,006 INFO L85 PathProgramCache]: Analyzing trace with hash -629917056, now seen corresponding path program 1 times [2021-11-23 16:58:40,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:40,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977865884] [2021-11-23 16:58:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:40,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:40,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:40,008 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:40,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 16:58:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:40,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:58:40,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:40,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:58:40,480 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 16:58:40,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-11-23 16:58:40,609 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 16:58:40,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2021-11-23 16:58:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:58:40,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:58:41,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:41,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977865884] [2021-11-23 16:58:41,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977865884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:41,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [139858169] [2021-11-23 16:58:41,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:41,088 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:41,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:58:41,090 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:58:41,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-23 16:58:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:41,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:58:41,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:41,740 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-23 16:58:41,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 27 [2021-11-23 16:58:42,000 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-23 16:58:42,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-11-23 16:58:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:44,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:45,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [139858169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:45,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188915838] [2021-11-23 16:58:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:45,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:58:45,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:58:45,210 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:58:45,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-23 16:58:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:58:45,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:45,542 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 16:58:45,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-23 16:58:45,647 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 16:58:45,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-23 16:58:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:58:45,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:58:45,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188915838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:45,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:58:45,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 5, 5, 3, 3] total 9 [2021-11-23 16:58:45,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538602550] [2021-11-23 16:58:45,960 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:58:45,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 16:58:45,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 16:58:45,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:58:45,962 INFO L87 Difference]: Start difference. First operand 189 states and 241 transitions. Second operand has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 10 states have internal predecessors, (95), 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 16:58:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:46,327 INFO L93 Difference]: Finished difference Result 236 states and 281 transitions. [2021-11-23 16:58:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:58:46,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 10 states have internal predecessors, (95), 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 16:58:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:46,330 INFO L225 Difference]: With dead ends: 236 [2021-11-23 16:58:46,330 INFO L226 Difference]: Without dead ends: 236 [2021-11-23 16:58:46,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 190 SyntacticMatches, 25 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:58:46,331 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 133 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:46,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 196 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2021-11-23 16:58:46,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-23 16:58:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 212. [2021-11-23 16:58:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 196 states have (on average 1.3622448979591837) internal successors, (267), 211 states have internal predecessors, (267), 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 16:58:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 267 transitions. [2021-11-23 16:58:46,339 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 267 transitions. Word has length 37 [2021-11-23 16:58:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:46,339 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 267 transitions. [2021-11-23 16:58:46,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 10 states have internal predecessors, (95), 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 16:58:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 267 transitions. [2021-11-23 16:58:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 16:58:46,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:46,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:58:46,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:46,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:46,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:46,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:58:46,957 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:58:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:46,957 INFO L85 PathProgramCache]: Analyzing trace with hash -629917055, now seen corresponding path program 1 times [2021-11-23 16:58:46,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:46,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599099403] [2021-11-23 16:58:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:46,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:46,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:46,958 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:46,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 16:58:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:47,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:58:47,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:47,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:58:47,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:58:47,541 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:58:47,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-23 16:58:47,602 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 16:58:47,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-23 16:58:47,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:47,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 16:58:47,816 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:58:47,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 16:58:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:47,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:51,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:51,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599099403] [2021-11-23 16:58:51,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599099403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:51,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [662421435] [2021-11-23 16:58:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:51,716 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:51,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:58:51,717 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:58:51,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-23 16:58:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:52,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:58:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:52,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:58:52,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:58:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:52,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 16:58:52,676 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 16:58:52,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-23 16:58:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:52,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 16:58:52,986 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 16:58:52,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 16:58:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:53,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:07,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [662421435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:07,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367930921] [2021-11-23 16:59:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:07,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:59:07,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:59:07,502 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:59:07,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-23 16:59:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:07,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 16:59:07,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:07,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:59:08,048 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:59:08,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-23 16:59:08,089 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 16:59:08,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-23 16:59:08,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:08,459 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 16:59:08,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:59:08,507 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 16:59:08,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:59:08,607 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:59:08,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-23 16:59:08,664 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 16:59:08,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-11-23 16:59:08,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 16:59:09,086 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 16:59:09,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2021-11-23 16:59:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:09,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:20,279 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-23 16:59:20,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 41 [2021-11-23 16:59:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:25,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367930921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:25,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:59:25,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 5, 11, 7] total 19 [2021-11-23 16:59:25,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736617705] [2021-11-23 16:59:25,266 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:59:25,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 16:59:25,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:25,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 16:59:25,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=288, Unknown=6, NotChecked=0, Total=380 [2021-11-23 16:59:25,268 INFO L87 Difference]: Start difference. First operand 212 states and 267 transitions. Second operand has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 states have internal predecessors, (114), 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 16:59:25,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:25,918 INFO L93 Difference]: Finished difference Result 227 states and 283 transitions. [2021-11-23 16:59:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:59:25,919 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 states have internal predecessors, (114), 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 16:59:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:25,920 INFO L225 Difference]: With dead ends: 227 [2021-11-23 16:59:25,920 INFO L226 Difference]: Without dead ends: 227 [2021-11-23 16:59:25,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=141, Invalid=405, Unknown=6, NotChecked=0, Total=552 [2021-11-23 16:59:25,921 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 31 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:25,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 289 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2021-11-23 16:59:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-23 16:59:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2021-11-23 16:59:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 208 states have (on average 1.3461538461538463) internal successors, (280), 223 states have internal predecessors, (280), 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 16:59:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 280 transitions. [2021-11-23 16:59:25,926 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 280 transitions. Word has length 37 [2021-11-23 16:59:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:25,926 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 280 transitions. [2021-11-23 16:59:25,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 states have internal predecessors, (114), 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 16:59:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 280 transitions. [2021-11-23 16:59:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 16:59:25,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:25,927 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] [2021-11-23 16:59:25,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-23 16:59:26,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:26,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:26,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:26,546 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:59:26,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:26,547 INFO L85 PathProgramCache]: Analyzing trace with hash 373585119, now seen corresponding path program 1 times [2021-11-23 16:59:26,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:26,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619048126] [2021-11-23 16:59:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:26,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:26,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:26,548 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:26,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 16:59:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:26,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:59:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:26,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:59:26,845 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:59:26,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 16:59:26,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:26,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-23 16:59:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:27,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:27,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:27,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619048126] [2021-11-23 16:59:27,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619048126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:27,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1827521439] [2021-11-23 16:59:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:27,148 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:59:27,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:59:27,149 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:59:27,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-23 16:59:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:27,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:59:27,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:27,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:59:27,639 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:59:27,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 16:59:27,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:27,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-23 16:59:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:27,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:28,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1827521439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:28,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58162239] [2021-11-23 16:59:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:28,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:59:28,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:59:28,102 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:59:28,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-23 16:59:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:28,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:59:28,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:28,361 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 16:59:28,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 16:59:28,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:28,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-23 16:59:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:28,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:28,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58162239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:28,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:59:28,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-23 16:59:28,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069266215] [2021-11-23 16:59:28,661 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:59:28,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 16:59:28,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 16:59:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:59:28,663 INFO L87 Difference]: Start difference. First operand 224 states and 280 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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 16:59:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:30,440 INFO L93 Difference]: Finished difference Result 287 states and 325 transitions. [2021-11-23 16:59:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 16:59:30,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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 38 [2021-11-23 16:59:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:30,442 INFO L225 Difference]: With dead ends: 287 [2021-11-23 16:59:30,442 INFO L226 Difference]: Without dead ends: 287 [2021-11-23 16:59:30,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-11-23 16:59:30,443 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 278 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:30,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 321 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 16:59:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-23 16:59:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 224. [2021-11-23 16:59:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 208 states have (on average 1.3413461538461537) internal successors, (279), 223 states have internal predecessors, (279), 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 16:59:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 279 transitions. [2021-11-23 16:59:30,449 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 279 transitions. Word has length 38 [2021-11-23 16:59:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:30,449 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 279 transitions. [2021-11-23 16:59:30,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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 16:59:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 279 transitions. [2021-11-23 16:59:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 16:59:30,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:30,450 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:59:30,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:30,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-23 16:59:30,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-11-23 16:59:31,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:31,052 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 16:59:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:31,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1469153886, now seen corresponding path program 1 times [2021-11-23 16:59:31,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:31,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332521464] [2021-11-23 16:59:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:31,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:31,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:31,053 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:31,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 16:59:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:31,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 16:59:31,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:31,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 16:59:31,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:31,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:31,916 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-23 16:59:31,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2021-11-23 16:59:32,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:59:32,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2021-11-23 16:59:32,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:59:32,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:59:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:32,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:33,463 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~x~0#1.base| (_ BitVec 32))) (or (forall ((v_ArrVal_3309 (Array (_ BitVec 32) (_ BitVec 32)))) (bvslt (select (select (store |c_#memory_int| |ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3309) |c_ULTIMATE.start_main_~y~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~y~0#1.offset|)) (_ bv16 32))) (and (= |c_ULTIMATE.start_main_~y~0#1.offset| |c_ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1.base| |c_ULTIMATE.start_main_~y~0#1.base|)))) is different from false [2021-11-23 16:59:33,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:59:33,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-23 16:59:33,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-23 16:59:33,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:36,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:36,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332521464] [2021-11-23 16:59:36,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332521464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:36,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [561467145] [2021-11-23 16:59:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:36,569 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:59:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:59:36,589 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:59:36,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-23 16:59:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:37,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 16:59:37,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:37,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 16:59:37,749 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 16:59:37,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 16:59:38,263 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-23 16:59:38,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 50 [2021-11-23 16:59:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:38,738 INFO L354 Elim1Store]: treesize reduction 63, result has 21.3 percent of original size [2021-11-23 16:59:38,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 70 [2021-11-23 16:59:39,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:59:39,109 INFO L354 Elim1Store]: treesize reduction 61, result has 23.8 percent of original size [2021-11-23 16:59:39,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 72 [2021-11-23 16:59:39,517 INFO L354 Elim1Store]: treesize reduction 64, result has 35.4 percent of original size [2021-11-23 16:59:39,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 71 [2021-11-23 16:59:39,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:41,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:59:42,677 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 16:59:42,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 44 [2021-11-23 16:59:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:42,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:45,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [561467145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:45,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488644858] [2021-11-23 16:59:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:45,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:59:45,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:59:45,810 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:59:45,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-23 16:59:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:46,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 16:59:46,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:46,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 16:59:46,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:46,322 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-23 16:59:46,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2021-11-23 16:59:46,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:46,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:59:46,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2021-11-23 16:59:46,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:59:46,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:59:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:46,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:46,955 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~x~0#1.base| (_ BitVec 32))) (or (and (= |c_ULTIMATE.start_main_~y~0#1.offset| |c_ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1.base| |c_ULTIMATE.start_main_~y~0#1.base|)) (forall ((v_ArrVal_3459 (Array (_ BitVec 32) (_ BitVec 32)))) (bvslt (select (select (store |c_#memory_int| |ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3459) |c_ULTIMATE.start_main_~y~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~y~0#1.offset|)) (_ bv16 32))))) is different from false [2021-11-23 16:59:47,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:59:47,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-23 16:59:47,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-23 16:59:47,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:59:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:48,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488644858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:48,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:59:48,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15, 11, 13, 13] total 47 [2021-11-23 16:59:48,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888789590] [2021-11-23 16:59:48,815 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:59:48,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 16:59:48,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 16:59:48,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1851, Unknown=2, NotChecked=174, Total=2162 [2021-11-23 16:59:48,817 INFO L87 Difference]: Start difference. First operand 224 states and 279 transitions. Second operand has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 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 16:59:58,309 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~x~0#1.base| (_ BitVec 32))) (or (and (= |c_ULTIMATE.start_main_~y~0#1.offset| |c_ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1.base| |c_ULTIMATE.start_main_~y~0#1.base|)) (forall ((v_ArrVal_3459 (Array (_ BitVec 32) (_ BitVec 32)))) (bvslt (select (select (store |c_#memory_int| |ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3459) |c_ULTIMATE.start_main_~y~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~y~0#1.offset|)) (_ bv16 32))))) (exists ((|ULTIMATE.start_main_#t~mem10#1.offset| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~y~0#1.base|) |c_ULTIMATE.start_main_~y~0#1.offset|)) (.cse1 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10#1.offset|))) (and (or (= .cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (and (= |c_ULTIMATE.start_main_~x~0#1.base| .cse0) (= .cse1 |c_ULTIMATE.start_main_~x~0#1.offset|))) (= |c_ULTIMATE.start_main_~y~0#1.base| (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))))) (forall ((|ULTIMATE.start_main_~x~0#1.base| (_ BitVec 32))) (or (forall ((v_ArrVal_3309 (Array (_ BitVec 32) (_ BitVec 32)))) (bvslt (select (select (store |c_#memory_int| |ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3309) |c_ULTIMATE.start_main_~y~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~y~0#1.offset|)) (_ bv16 32))) (and (= |c_ULTIMATE.start_main_~y~0#1.offset| |c_ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1.base| |c_ULTIMATE.start_main_~y~0#1.base|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~y~0#1.base|)))) (_ bv1 1))) (= |c_ULTIMATE.start_main_~y~0#1.offset| (_ bv0 32)) (= (_ bv1 32) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~y~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~y~0#1.offset|))) (= |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv0 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select |c_#valid| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~y~0#1.base|) |c_ULTIMATE.start_main_~y~0#1.offset|)))))))) is different from false [2021-11-23 17:00:13,810 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~x~0#1.base| (_ BitVec 32))) (or (and (= |c_ULTIMATE.start_main_~y~0#1.offset| |c_ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1.base| |c_ULTIMATE.start_main_~y~0#1.base|)) (forall ((v_ArrVal_3459 (Array (_ BitVec 32) (_ BitVec 32)))) (bvslt (select (select (store |c_#memory_int| |ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3459) |c_ULTIMATE.start_main_~y~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~y~0#1.offset|)) (_ bv16 32))))) (exists ((|ULTIMATE.start_main_#t~mem10#1.offset| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~y~0#1.base|) |c_ULTIMATE.start_main_~y~0#1.offset|)) (.cse1 (bvadd (_ bv4 32) |ULTIMATE.start_main_#t~mem10#1.offset|))) (and (or (= .cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (and (= |c_ULTIMATE.start_main_~x~0#1.base| .cse0) (= .cse1 |c_ULTIMATE.start_main_~x~0#1.offset|))) (= |c_ULTIMATE.start_main_~y~0#1.base| (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))))) (forall ((|ULTIMATE.start_main_~x~0#1.base| (_ BitVec 32))) (or (forall ((v_ArrVal_3309 (Array (_ BitVec 32) (_ BitVec 32)))) (bvslt (select (select (store |c_#memory_int| |ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3309) |c_ULTIMATE.start_main_~y~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~y~0#1.offset|)) (_ bv16 32))) (and (= |c_ULTIMATE.start_main_~y~0#1.offset| |c_ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1.base| |c_ULTIMATE.start_main_~y~0#1.base|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~y~0#1.base|)))) (_ bv1 1))) (= |c_ULTIMATE.start_main_~y~0#1.offset| (_ bv0 32)) (= |c_ULTIMATE.start_main_~x~0#1.offset| (_ bv0 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select |c_#valid| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~y~0#1.base|) |c_ULTIMATE.start_main_~y~0#1.offset|)))))))) is different from false [2021-11-23 17:00:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:18,721 INFO L93 Difference]: Finished difference Result 307 states and 371 transitions. [2021-11-23 17:00:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-23 17:00:18,722 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 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 38 [2021-11-23 17:00:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:18,724 INFO L225 Difference]: With dead ends: 307 [2021-11-23 17:00:18,724 INFO L226 Difference]: Without dead ends: 307 [2021-11-23 17:00:18,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 177 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=498, Invalid=6320, Unknown=4, NotChecked=660, Total=7482 [2021-11-23 17:00:18,728 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 187 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:18,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 925 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1536 Invalid, 0 Unknown, 566 Unchecked, 8.3s Time] [2021-11-23 17:00:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-23 17:00:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 251. [2021-11-23 17:00:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 235 states have (on average 1.3191489361702127) internal successors, (310), 250 states have internal predecessors, (310), 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 17:00:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 310 transitions. [2021-11-23 17:00:18,735 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 310 transitions. Word has length 38 [2021-11-23 17:00:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:18,735 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 310 transitions. [2021-11-23 17:00:18,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 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 17:00:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 310 transitions. [2021-11-23 17:00:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 17:00:18,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:18,737 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] [2021-11-23 17:00:18,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:18,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-23 17:00:19,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-11-23 17:00:19,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:19,343 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 17:00:19,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1469146581, now seen corresponding path program 1 times [2021-11-23 17:00:19,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:19,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423221588] [2021-11-23 17:00:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:19,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:19,346 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:19,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-23 17:00:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:19,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:00:19,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:19,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:00:20,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 17:00:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:20,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:20,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:20,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423221588] [2021-11-23 17:00:20,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423221588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:20,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:20,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 17:00:20,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128415452] [2021-11-23 17:00:20,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:20,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 17:00:20,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:20,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 17:00:20,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:00:20,504 INFO L87 Difference]: Start difference. First operand 251 states and 310 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 17:00:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:22,624 INFO L93 Difference]: Finished difference Result 268 states and 320 transitions. [2021-11-23 17:00:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 17:00:22,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 38 [2021-11-23 17:00:22,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:22,627 INFO L225 Difference]: With dead ends: 268 [2021-11-23 17:00:22,627 INFO L226 Difference]: Without dead ends: 268 [2021-11-23 17:00:22,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:00:22,627 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 277 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:22,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 207 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 162 Invalid, 0 Unknown, 154 Unchecked, 1.1s Time] [2021-11-23 17:00:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-23 17:00:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 252. [2021-11-23 17:00:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 236 states have (on average 1.3177966101694916) internal successors, (311), 251 states have internal predecessors, (311), 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 17:00:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 311 transitions. [2021-11-23 17:00:22,634 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 311 transitions. Word has length 38 [2021-11-23 17:00:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:22,634 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 311 transitions. [2021-11-23 17:00:22,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 17:00:22,635 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 311 transitions. [2021-11-23 17:00:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 17:00:22,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:22,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:22,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:22,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:22,849 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 17:00:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash 415323279, now seen corresponding path program 1 times [2021-11-23 17:00:22,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:22,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695256287] [2021-11-23 17:00:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:22,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:22,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:22,851 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:22,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-23 17:00:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:00:23,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:23,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:00:23,321 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 17:00:23,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-23 17:00:23,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:23,792 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 17:00:23,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2021-11-23 17:00:23,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-11-23 17:00:24,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 17:00:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:24,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:24,544 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3610 (_ BitVec 1)) (v_ArrVal_3609 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |c_ULTIMATE.start_main_~first~0#1.base| v_ArrVal_3610) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3609) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32))))))))))) (_ bv1 1)))) is different from false [2021-11-23 17:00:24,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:24,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2021-11-23 17:00:24,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:24,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 67 [2021-11-23 17:00:24,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 17:00:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:33,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:33,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695256287] [2021-11-23 17:00:33,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695256287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:33,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1942504928] [2021-11-23 17:00:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:33,965 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:33,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:00:33,966 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:00:33,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-11-23 17:00:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:34,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:00:34,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:34,637 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 17:00:34,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-11-23 17:00:34,926 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 17:00:34,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 17:00:35,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:35,336 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 17:00:35,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2021-11-23 17:00:35,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-23 17:00:35,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 17:00:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:35,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:36,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:36,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 79 [2021-11-23 17:00:36,140 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3692 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_main_~first~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3692) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32)))))) (forall ((v_ArrVal_3692 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3692) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32))) |c_ULTIMATE.start_main_~x~0#1.base|))) is different from false [2021-11-23 17:00:36,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:36,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-11-23 17:00:36,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:36,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2021-11-23 17:00:36,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 17:00:36,217 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:00:36,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2021-11-23 17:00:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:36,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1942504928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:36,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445687088] [2021-11-23 17:00:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:36,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:00:36,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:00:36,677 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:00:36,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-23 17:00:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:36,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:00:36,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:37,237 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:00:37,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-23 17:00:37,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:37,774 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 17:00:37,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2021-11-23 17:00:38,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-23 17:00:38,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 17:00:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:38,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:38,668 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3773 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3773) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32))))))) (_ bv1 1)))) (forall ((v_ArrVal_3773 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_main_~first~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3773) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32))))))) is different from false [2021-11-23 17:00:38,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:38,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-11-23 17:00:38,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:38,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2021-11-23 17:00:38,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 17:00:38,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:38,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2021-11-23 17:00:38,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:38,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:38,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 17:00:39,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 17:00:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:39,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445687088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:39,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:00:39,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 12, 11] total 43 [2021-11-23 17:00:39,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398734390] [2021-11-23 17:00:39,344 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:00:39,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 17:00:39,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 17:00:39,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1469, Unknown=3, NotChecked=240, Total=1892 [2021-11-23 17:00:39,347 INFO L87 Difference]: Start difference. First operand 252 states and 311 transitions. Second operand has 44 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 44 states have internal predecessors, (169), 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 17:00:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:41,650 INFO L93 Difference]: Finished difference Result 295 states and 344 transitions. [2021-11-23 17:00:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:00:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 44 states have internal predecessors, (169), 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 39 [2021-11-23 17:00:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:41,652 INFO L225 Difference]: With dead ends: 295 [2021-11-23 17:00:41,652 INFO L226 Difference]: Without dead ends: 295 [2021-11-23 17:00:41,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 180 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 3 IntricatePredicates, 5 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=276, Invalid=2085, Unknown=3, NotChecked=288, Total=2652 [2021-11-23 17:00:41,654 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 174 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:41,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 855 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 453 Invalid, 0 Unknown, 674 Unchecked, 1.6s Time] [2021-11-23 17:00:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-23 17:00:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 269. [2021-11-23 17:00:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 253 states have (on average 1.3122529644268774) internal successors, (332), 268 states have internal predecessors, (332), 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 17:00:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 332 transitions. [2021-11-23 17:00:41,659 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 332 transitions. Word has length 39 [2021-11-23 17:00:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:41,659 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 332 transitions. [2021-11-23 17:00:41,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 44 states have internal predecessors, (169), 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 17:00:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 332 transitions. [2021-11-23 17:00:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 17:00:41,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:41,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:41,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-23 17:00:41,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2021-11-23 17:00:42,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2021-11-23 17:00:42,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:42,274 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 17:00:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash 415323280, now seen corresponding path program 1 times [2021-11-23 17:00:42,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:42,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749550549] [2021-11-23 17:00:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:42,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:42,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:42,276 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:42,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-23 17:00:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:42,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:00:42,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:42,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:00:42,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:00:42,770 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:00:42,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 17:00:43,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:43,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:43,196 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 17:00:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 17:00:43,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 17:00:43,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 17:00:43,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:00:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:43,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:43,870 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3858 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3858) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32))))) (bvule (bvadd .cse0 (_ bv12 32)) (bvadd (_ bv16 32) .cse0)))) (forall ((v_ArrVal_3859 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3858 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv16 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3858) |c_ULTIMATE.start_main_~first~0#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3859) |c_ULTIMATE.start_main_~first~0#1.base|) .cse1)))))) is different from false [2021-11-23 17:00:43,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:43,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2021-11-23 17:00:43,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:43,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2021-11-23 17:00:43,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 17:00:44,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:44,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-11-23 17:00:44,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:44,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-11-23 17:00:44,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:44,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:44,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-23 17:00:44,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:44,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:44,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-23 17:00:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:44,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:44,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749550549] [2021-11-23 17:00:44,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749550549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:44,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [510689266] [2021-11-23 17:00:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:44,705 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:44,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:00:44,707 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:00:44,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2021-11-23 17:00:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 17:00:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:45,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:00:45,600 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:00:45,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 17:00:45,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:00:45,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:45,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:45,979 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 17:00:45,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 17:00:45,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 17:00:46,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 17:00:46,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:00:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:46,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:46,387 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3945 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3945) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32))))) (bvule (bvadd .cse0 (_ bv12 32)) (bvadd (_ bv16 32) .cse0)))) (forall ((v_ArrVal_3945 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3944 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv16 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3945) |c_ULTIMATE.start_main_~first~0#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3944) |c_ULTIMATE.start_main_~first~0#1.base|) .cse1)))))) is different from false [2021-11-23 17:00:46,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:46,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2021-11-23 17:00:46,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:46,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2021-11-23 17:00:46,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 17:00:46,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:46,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-11-23 17:00:46,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:46,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-11-23 17:00:46,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:46,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:46,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-23 17:00:46,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:46,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:46,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-23 17:00:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:47,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [510689266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:47,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509349133] [2021-11-23 17:00:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:47,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:00:47,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:00:47,216 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:00:47,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-23 17:00:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:47,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:00:47,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:47,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:00:47,640 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:00:47,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 17:00:47,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:47,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:48,018 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 17:00:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 17:00:48,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 17:00:48,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 17:00:48,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:00:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:48,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:48,428 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4028 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4028) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32))))) (bvule (bvadd .cse0 (_ bv12 32)) (bvadd (_ bv16 32) .cse0)))) (forall ((v_ArrVal_4029 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4028 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv16 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4028) |c_ULTIMATE.start_main_~first~0#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4029) |c_ULTIMATE.start_main_~first~0#1.base|) .cse1)))))) is different from false [2021-11-23 17:00:48,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:48,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-11-23 17:00:48,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:48,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-11-23 17:00:48,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:48,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 65 [2021-11-23 17:00:48,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:48,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 93 [2021-11-23 17:00:48,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2021-11-23 17:00:48,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-23 17:00:49,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:49,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2021-11-23 17:00:49,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:49,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2021-11-23 17:00:49,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 17:00:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:50,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509349133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:50,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:00:50,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 8] total 18 [2021-11-23 17:00:50,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200792990] [2021-11-23 17:00:50,097 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:00:50,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 17:00:50,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 17:00:50,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=204, Unknown=3, NotChecked=90, Total=342 [2021-11-23 17:00:50,099 INFO L87 Difference]: Start difference. First operand 269 states and 332 transitions. Second operand has 19 states, 18 states have (on average 4.777777777777778) internal successors, (86), 19 states have internal predecessors, (86), 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 17:00:53,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:53,182 INFO L93 Difference]: Finished difference Result 338 states and 396 transitions. [2021-11-23 17:00:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 17:00:53,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.777777777777778) internal successors, (86), 19 states have internal predecessors, (86), 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 39 [2021-11-23 17:00:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:53,185 INFO L225 Difference]: With dead ends: 338 [2021-11-23 17:00:53,185 INFO L226 Difference]: Without dead ends: 338 [2021-11-23 17:00:53,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=95, Invalid=376, Unknown=3, NotChecked=126, Total=600 [2021-11-23 17:00:53,186 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 206 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:53,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 599 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 479 Invalid, 0 Unknown, 469 Unchecked, 2.1s Time] [2021-11-23 17:00:53,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-23 17:00:53,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 301. [2021-11-23 17:00:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 285 states have (on average 1.3403508771929824) internal successors, (382), 300 states have internal predecessors, (382), 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 17:00:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 382 transitions. [2021-11-23 17:00:53,193 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 382 transitions. Word has length 39 [2021-11-23 17:00:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:53,193 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 382 transitions. [2021-11-23 17:00:53,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.777777777777778) internal successors, (86), 19 states have internal predecessors, (86), 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 17:00:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 382 transitions. [2021-11-23 17:00:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 17:00:53,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:53,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:53,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:53,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-23 17:00:53,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:53,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:53,801 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 17:00:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:53,801 INFO L85 PathProgramCache]: Analyzing trace with hash -9880553, now seen corresponding path program 1 times [2021-11-23 17:00:53,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:53,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615249644] [2021-11-23 17:00:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:53,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:53,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:53,803 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:53,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-23 17:00:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:54,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:00:54,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:54,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:54,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615249644] [2021-11-23 17:00:54,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615249644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [994439847] [2021-11-23 17:00:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:54,435 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:54,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:00:54,436 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:00:54,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-11-23 17:00:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:54,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:00:54,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:55,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:55,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [994439847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:55,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278826984] [2021-11-23 17:00:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:55,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:00:55,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:00:55,213 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:00:55,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-23 17:00:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:00:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:55,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278826984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:56,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:00:56,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 11 [2021-11-23 17:00:56,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995254651] [2021-11-23 17:00:56,022 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:00:56,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 17:00:56,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 17:00:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:00:56,023 INFO L87 Difference]: Start difference. First operand 301 states and 382 transitions. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 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 17:00:56,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:56,317 INFO L93 Difference]: Finished difference Result 356 states and 428 transitions. [2021-11-23 17:00:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:00:56,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 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 40 [2021-11-23 17:00:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:56,320 INFO L225 Difference]: With dead ends: 356 [2021-11-23 17:00:56,320 INFO L226 Difference]: Without dead ends: 356 [2021-11-23 17:00:56,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:00:56,321 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 419 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:56,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 480 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:00:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-23 17:00:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 324. [2021-11-23 17:00:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 308 states have (on average 1.3766233766233766) internal successors, (424), 323 states have internal predecessors, (424), 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 17:00:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 424 transitions. [2021-11-23 17:00:56,330 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 424 transitions. Word has length 40 [2021-11-23 17:00:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:56,330 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 424 transitions. [2021-11-23 17:00:56,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 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 17:00:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 424 transitions. [2021-11-23 17:00:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 17:00:56,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:56,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:56,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:56,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2021-11-23 17:00:56,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:56,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:00:56,948 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 17:00:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash -306285040, now seen corresponding path program 1 times [2021-11-23 17:00:56,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:56,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710571184] [2021-11-23 17:00:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:56,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:56,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:56,950 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:56,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-23 17:00:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:57,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:00:57,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 17:00:57,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:57,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710571184] [2021-11-23 17:00:57,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710571184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:57,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:57,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:00:57,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665756479] [2021-11-23 17:00:57,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:57,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:00:57,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:57,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:00:57,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:00:57,299 INFO L87 Difference]: Start difference. First operand 324 states and 424 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:57,512 INFO L93 Difference]: Finished difference Result 346 states and 447 transitions. [2021-11-23 17:00:57,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:00:57,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-23 17:00:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:57,514 INFO L225 Difference]: With dead ends: 346 [2021-11-23 17:00:57,514 INFO L226 Difference]: Without dead ends: 346 [2021-11-23 17:00:57,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 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 17:00:57,515 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 25 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:57,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 134 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:00:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-23 17:00:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 323. [2021-11-23 17:00:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 308 states have (on average 1.37012987012987) internal successors, (422), 322 states have internal predecessors, (422), 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 17:00:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 422 transitions. [2021-11-23 17:00:57,522 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 422 transitions. Word has length 41 [2021-11-23 17:00:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:57,522 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 422 transitions. [2021-11-23 17:00:57,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 422 transitions. [2021-11-23 17:00:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 17:00:57,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:57,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:57,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:57,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:57,737 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 17:00:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:57,737 INFO L85 PathProgramCache]: Analyzing trace with hash -306285039, now seen corresponding path program 1 times [2021-11-23 17:00:57,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:57,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501688751] [2021-11-23 17:00:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:57,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:57,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:57,739 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:57,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-11-23 17:00:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:00:58,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:58,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:00:58,221 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:00:58,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 17:00:58,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:00:58,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:58,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:00:58,612 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 17:00:58,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 17:00:58,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 17:00:58,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-11-23 17:00:58,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 17:00:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:58,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:59,480 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4421 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4421) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32))))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_4421 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4422 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4421) |c_ULTIMATE.start_main_~first~0#1.base|) .cse1) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4422) |c_ULTIMATE.start_main_~first~0#1.base|) .cse1)))))) is different from false [2021-11-23 17:00:59,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:59,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2021-11-23 17:00:59,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:59,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2021-11-23 17:00:59,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 17:00:59,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:59,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-11-23 17:00:59,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:00:59,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-11-23 17:00:59,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:59,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:59,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-23 17:00:59,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:00:59,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:00:59,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-23 17:01:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:00,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501688751] [2021-11-23 17:01:00,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501688751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [480709096] [2021-11-23 17:01:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:00,285 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:01:00,286 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:01:00,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2021-11-23 17:01:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:01,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:01:01,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:01,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:01:01,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:01:01,362 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:01:01,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 17:01:01,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:01:01,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:01:01,860 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 17:01:01,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 17:01:01,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 17:01:02,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 17:01:02,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:01:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:02,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:02,348 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4508 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4507 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4507) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4508) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0))))) (forall ((v_ArrVal_4507 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4507) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32))))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) is different from false [2021-11-23 17:01:02,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:02,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-11-23 17:01:02,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:02,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-11-23 17:01:02,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:02,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 65 [2021-11-23 17:01:02,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:02,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 93 [2021-11-23 17:01:02,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-23 17:01:02,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2021-11-23 17:01:03,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:03,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2021-11-23 17:01:03,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:03,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2021-11-23 17:01:03,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 17:01:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:04,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [480709096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:04,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658841253] [2021-11-23 17:01:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:04,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:04,206 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:01:04,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-23 17:01:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:01:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:04,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:01:04,664 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:01:04,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 17:01:04,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:01:04,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:01:04,991 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 17:01:04,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-23 17:01:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 17:01:05,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 17:01:05,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:01:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:05,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:05,402 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4591 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4592 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4591) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4592) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0))))) (forall ((v_ArrVal_4591 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4591) |c_ULTIMATE.start_main_~first~0#1.base|) (bvadd |c_ULTIMATE.start_main_~first~0#1.offset| (_ bv12 32))))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) is different from false [2021-11-23 17:01:05,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:05,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2021-11-23 17:01:05,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:05,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-11-23 17:01:05,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:05,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 65 [2021-11-23 17:01:05,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:05,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 93 [2021-11-23 17:01:05,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-23 17:01:05,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2021-11-23 17:01:06,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:06,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2021-11-23 17:01:06,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:06,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2021-11-23 17:01:06,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 17:01:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:07,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658841253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:07,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:01:07,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 9] total 24 [2021-11-23 17:01:07,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370294448] [2021-11-23 17:01:07,226 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:01:07,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 17:01:07,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 17:01:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=402, Unknown=3, NotChecked=126, Total=600 [2021-11-23 17:01:07,228 INFO L87 Difference]: Start difference. First operand 323 states and 422 transitions. Second operand has 25 states, 24 states have (on average 4.5) internal successors, (108), 25 states have internal predecessors, (108), 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 17:01:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:12,729 INFO L93 Difference]: Finished difference Result 404 states and 479 transitions. [2021-11-23 17:01:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 17:01:12,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.5) internal successors, (108), 25 states have internal predecessors, (108), 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 41 [2021-11-23 17:01:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:12,732 INFO L225 Difference]: With dead ends: 404 [2021-11-23 17:01:12,732 INFO L226 Difference]: Without dead ends: 404 [2021-11-23 17:01:12,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 211 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=248, Invalid=1167, Unknown=3, NotChecked=222, Total=1640 [2021-11-23 17:01:12,733 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 458 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 462 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:12,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 478 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 778 Invalid, 0 Unknown, 462 Unchecked, 3.6s Time] [2021-11-23 17:01:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-23 17:01:12,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 323. [2021-11-23 17:01:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 308 states have (on average 1.3603896103896105) internal successors, (419), 322 states have internal predecessors, (419), 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 17:01:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2021-11-23 17:01:12,740 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 41 [2021-11-23 17:01:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:12,740 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2021-11-23 17:01:12,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.5) internal successors, (108), 25 states have internal predecessors, (108), 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 17:01:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2021-11-23 17:01:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 17:01:12,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:12,742 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:12,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:12,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2021-11-23 17:01:13,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-11-23 17:01:13,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:13,349 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 39 more)] === [2021-11-23 17:01:13,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1629209681, now seen corresponding path program 1 times [2021-11-23 17:01:13,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:13,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221377062] [2021-11-23 17:01:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:13,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:13,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:13,351 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:13,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-11-23 17:01:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:13,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 17:01:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:13,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:01:13,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:13,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:01:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:13,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:01:13,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:01:14,061 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 17:01:14,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 17:01:14,247 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-11-23 17:01:14,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 38 [2021-11-23 17:01:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:01:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:14,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:01:14,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:14,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:01:14,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:01:14,433 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 17:01:14,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 17:01:14,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 17:01:15,092 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:01:15,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 17 [2021-11-23 17:01:15,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 17:01:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:15,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:18,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:18,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 288 [2021-11-23 17:01:42,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:42,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 542 treesize of output 360 [2021-11-23 17:01:42,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:42,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:42,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:42,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:42,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:43,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 9 case distinctions, treesize of input 132 treesize of output 159 [2021-11-23 17:01:43,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,242 INFO L354 Elim1Store]: treesize reduction 73, result has 41.1 percent of original size [2021-11-23 17:01:43,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 159 treesize of output 185 [2021-11-23 17:01:43,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,346 INFO L354 Elim1Store]: treesize reduction 17, result has 55.3 percent of original size [2021-11-23 17:01:43,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 193 [2021-11-23 17:01:43,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,521 INFO L354 Elim1Store]: treesize reduction 73, result has 41.1 percent of original size [2021-11-23 17:01:43,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 193 treesize of output 219 [2021-11-23 17:01:43,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,702 INFO L354 Elim1Store]: treesize reduction 73, result has 41.1 percent of original size [2021-11-23 17:01:43,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 219 treesize of output 245 [2021-11-23 17:01:43,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,822 INFO L354 Elim1Store]: treesize reduction 17, result has 55.3 percent of original size [2021-11-23 17:01:43,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 256 treesize of output 252 [2021-11-23 17:01:43,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:01:43,948 INFO L354 Elim1Store]: treesize reduction 17, result has 55.3 percent of original size [2021-11-23 17:01:43,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 251 treesize of output 247 [2021-11-23 17:01:43,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2021-11-23 17:01:43,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-23 17:01:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:44,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:44,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221377062] [2021-11-23 17:01:44,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221377062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:44,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [866135378] [2021-11-23 17:01:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:44,130 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:44,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:01:44,131 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:01:44,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2021-11-23 17:01:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:44,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 17:01:44,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:01:44,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:44,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:01:45,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:45,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:01:45,099 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 17:01:45,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 17:01:45,214 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-11-23 17:01:45,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 38 [2021-11-23 17:01:45,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 17:01:45,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:01:45,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:45,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:01:45,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:45,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:01:45,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:01:45,372 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 17:01:45,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 17:01:45,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 17:01:45,883 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-11-23 17:01:45,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-11-23 17:01:46,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 17:01:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:46,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:49,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:49,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 56 [2021-11-23 17:01:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:53,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [866135378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:53,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463742730] [2021-11-23 17:01:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:53,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:53,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:53,650 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:01:53,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-23 17:01:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:53,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 17:01:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:53,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:01:53,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:01:54,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:54,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:01:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:54,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:01:54,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:54,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:01:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:54,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:01:54,511 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 17:01:54,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 17:01:54,559 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 17:01:54,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 17:01:54,999 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-11-23 17:01:54,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 46 [2021-11-23 17:01:55,059 INFO L354 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2021-11-23 17:01:55,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 39 [2021-11-23 17:01:55,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:01:55,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 17:01:55,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 17:01:55,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 17:01:55,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:55,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2021-11-23 17:01:55,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:01:55,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2021-11-23 17:01:55,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-23 17:01:55,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-23 17:01:55,764 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 17:01:55,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2021-11-23 17:01:55,799 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-23 17:01:55,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 40 [2021-11-23 17:01:57,928 INFO L354 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2021-11-23 17:01:57,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 60 [2021-11-23 17:01:57,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:01:57,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:01:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:58,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:50,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:02:50,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 425 treesize of output 384 [2021-11-23 17:02:50,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:02:50,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:02:50,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:02:50,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 364 treesize of output 368 [2021-11-23 17:02:50,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:02:50,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 368 treesize of output 258 [2021-11-23 17:02:50,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:02:50,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:02:51,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:02:51,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 162 [2021-11-23 17:02:51,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:02:52,013 INFO L354 Elim1Store]: treesize reduction 49, result has 41.0 percent of original size [2021-11-23 17:02:52,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 162 treesize of output 169 [2021-11-23 17:02:52,103 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:02:52,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 202 [2021-11-23 17:02:52,109 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-23 17:02:52,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:02:52,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 18, 17] total 46 [2021-11-23 17:02:52,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314983611] [2021-11-23 17:02:52,110 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 17:02:52,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 17:02:52,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:52,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 17:02:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=5820, Unknown=225, NotChecked=0, Total=6480 [2021-11-23 17:02:52,113 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand has 47 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:02:52,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 143 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 85.8s TimeCoverageRelationStatistics Valid=435, Invalid=5820, Unknown=225, NotChecked=0, Total=6480 [2021-11-23 17:02:52,117 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 1 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 17:02:52,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:02:52,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2021-11-23 17:02:52,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2021-11-23 17:02:52,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-11-23 17:02:52,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:02:52,719 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1aad468b at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) 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 17:02:52,724 INFO L158 Benchmark]: Toolchain (without parser) took 404005.68ms. Allocated memory was 58.7MB in the beginning and 104.9MB in the end (delta: 46.1MB). Free memory was 35.6MB in the beginning and 64.4MB in the end (delta: -28.8MB). Peak memory consumption was 62.2MB. Max. memory is 16.1GB. [2021-11-23 17:02:52,724 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 58.7MB. Free memory was 39.1MB in the beginning and 39.0MB in the end (delta: 42.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:02:52,725 INFO L158 Benchmark]: CACSL2BoogieTranslator took 590.62ms. Allocated memory is still 58.7MB. Free memory was 35.4MB in the beginning and 33.7MB in the end (delta: 1.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:02:52,725 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.63ms. Allocated memory is still 58.7MB. Free memory was 33.7MB in the beginning and 31.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:02:52,725 INFO L158 Benchmark]: Boogie Preprocessor took 62.50ms. Allocated memory is still 58.7MB. Free memory was 31.6MB in the beginning and 29.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:02:52,725 INFO L158 Benchmark]: RCFGBuilder took 975.13ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 29.8MB in the beginning and 38.2MB in the end (delta: -8.4MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. [2021-11-23 17:02:52,726 INFO L158 Benchmark]: TraceAbstraction took 402290.76ms. Allocated memory was 71.3MB in the beginning and 104.9MB in the end (delta: 33.6MB). Free memory was 37.7MB in the beginning and 64.4MB in the end (delta: -26.7MB). Peak memory consumption was 52.6MB. Max. memory is 16.1GB. [2021-11-23 17:02:52,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 58.7MB. Free memory was 39.1MB in the beginning and 39.0MB in the end (delta: 42.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 590.62ms. Allocated memory is still 58.7MB. Free memory was 35.4MB in the beginning and 33.7MB in the end (delta: 1.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.63ms. Allocated memory is still 58.7MB. Free memory was 33.7MB in the beginning and 31.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.50ms. Allocated memory is still 58.7MB. Free memory was 31.6MB in the beginning and 29.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 975.13ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 29.8MB in the beginning and 38.2MB in the end (delta: -8.4MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. * TraceAbstraction took 402290.76ms. Allocated memory was 71.3MB in the beginning and 104.9MB in the end (delta: 33.6MB). Free memory was 37.7MB in the beginning and 64.4MB in the end (delta: -26.7MB). Peak memory consumption was 52.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1aad468b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1aad468b: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:02:52,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2dfd78-90d5-4cd8-a774-4234d5fcdd54/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 Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@1aad468b