./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.0.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_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/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_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.0.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/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_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/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 ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:02:56,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:02:56,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:02:56,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:02:56,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:02:56,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:02:56,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:02:56,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:02:56,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:02:56,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:02:56,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:02:56,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:02:56,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:02:56,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:02:56,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:02:56,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:02:56,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:02:56,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:02:56,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:02:56,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:02:56,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:02:56,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:02:56,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:02:56,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:02:56,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:02:56,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:02:56,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:02:56,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:02:56,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:02:56,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:02:56,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:02:56,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:02:56,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:02:56,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:02:56,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:02:56,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:02:56,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:02:56,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:02:56,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:02:56,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:02:56,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:02:56,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 17:02:56,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:02:56,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:02:56,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:02:56,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:02:56,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:02:56,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:02:56,467 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:02:56,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:02:56,468 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:02:56,468 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:02:56,468 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:02:56,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:02:56,469 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:02:56,469 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:02:56,469 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:02:56,469 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:02:56,470 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:02:56,470 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:02:56,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 17:02:56,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 17:02:56,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:02:56,471 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:02:56,472 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 17:02:56,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:02:56,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:02:56,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:02:56,472 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 17:02:56,473 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 17:02:56,473 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 17:02:56,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:02:56,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:02:56,474 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:02:56,474 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:02:56,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:02:56,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:02:56,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:02:56,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:02:56,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:02:56,475 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:02:56,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:02:56,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:02:56,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:02:56,476 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_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea [2021-11-23 17:02:56,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:02:56,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:02:56,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:02:56,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:02:56,774 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:02:56,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/memsafety/lockfree-3.0.i [2021-11-23 17:02:56,867 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/data/7aadc1744/19a9e781d2c943109f4244aeeecba921/FLAG4539c7540 [2021-11-23 17:02:57,461 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:02:57,461 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/sv-benchmarks/c/memsafety/lockfree-3.0.i [2021-11-23 17:02:57,478 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/data/7aadc1744/19a9e781d2c943109f4244aeeecba921/FLAG4539c7540 [2021-11-23 17:02:57,756 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/data/7aadc1744/19a9e781d2c943109f4244aeeecba921 [2021-11-23 17:02:57,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:02:57,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:02:57,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:02:57,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:02:57,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:02:57,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:02:57" (1/1) ... [2021-11-23 17:02:57,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8252524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:57, skipping insertion in model container [2021-11-23 17:02:57,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:02:57" (1/1) ... [2021-11-23 17:02:57,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:02:57,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:02:58,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:02:58,310 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:02:58,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:02:58,442 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:02:58,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58 WrapperNode [2021-11-23 17:02:58,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:02:58,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:02:58,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:02:58,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:02:58,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58" (1/1) ... [2021-11-23 17:02:58,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58" (1/1) ... [2021-11-23 17:02:58,535 INFO L137 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 120 [2021-11-23 17:02:58,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:02:58,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:02:58,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:02:58,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:02:58,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58" (1/1) ... [2021-11-23 17:02:58,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58" (1/1) ... [2021-11-23 17:02:58,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58" (1/1) ... [2021-11-23 17:02:58,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58" (1/1) ... [2021-11-23 17:02:58,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58" (1/1) ... [2021-11-23 17:02:58,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58" (1/1) ... [2021-11-23 17:02:58,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58" (1/1) ... [2021-11-23 17:02:58,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:02:58,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:02:58,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:02:58,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:02:58,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:58" (1/1) ... [2021-11-23 17:02:58,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:02:58,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:02:58,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:02:58,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:02:58,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:02:58,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:02:58,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:02:58,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:02:58,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 17:02:58,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 17:02:58,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:02:58,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:02:58,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:02:58,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:02:58,871 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:02:58,873 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:02:59,265 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:02:59,298 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:02:59,304 INFO L158 Benchmark]: Toolchain (without parser) took 1536.75ms. Allocated memory is still 100.7MB. Free memory was 65.1MB in the beginning and 49.4MB in the end (delta: 15.8MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2021-11-23 17:02:59,305 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 100.7MB. Free memory was 54.1MB in the beginning and 54.0MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:02:59,306 INFO L158 Benchmark]: CACSL2BoogieTranslator took 671.98ms. Allocated memory is still 100.7MB. Free memory was 64.9MB in the beginning and 69.3MB in the end (delta: -4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:02:59,308 INFO L158 Benchmark]: Boogie Procedure Inliner took 92.49ms. Allocated memory is still 100.7MB. Free memory was 69.3MB in the beginning and 67.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:02:59,311 INFO L158 Benchmark]: Boogie Preprocessor took 69.93ms. Allocated memory is still 100.7MB. Free memory was 67.2MB in the beginning and 65.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:02:59,312 INFO L158 Benchmark]: RCFGBuilder took 694.14ms. Allocated memory is still 100.7MB. Free memory was 65.5MB in the beginning and 49.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-23 17:02:59,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 100.7MB. Free memory was 54.1MB in the beginning and 54.0MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 671.98ms. Allocated memory is still 100.7MB. Free memory was 64.9MB in the beginning and 69.3MB in the end (delta: -4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 92.49ms. Allocated memory is still 100.7MB. Free memory was 69.3MB in the beginning and 67.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 69.93ms. Allocated memory is still 100.7MB. Free memory was 67.2MB in the beginning and 65.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 694.14ms. Allocated memory is still 100.7MB. Free memory was 65.5MB in the beginning and 49.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:02:59,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/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_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/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_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.0.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/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_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/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 ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:03:02,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:03:02,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:03:02,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:03:02,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:03:02,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:03:02,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:03:02,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:03:02,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:03:02,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:03:02,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:03:02,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:03:02,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:03:02,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:03:02,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:03:02,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:03:02,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:03:02,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:03:02,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:03:02,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:03:02,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:03:02,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:03:02,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:03:02,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:03:02,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:03:02,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:03:02,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:03:02,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:03:02,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:03:02,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:03:02,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:03:02,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:03:02,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:03:02,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:03:02,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:03:02,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:03:02,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:03:02,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:03:02,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:03:02,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:03:02,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:03:02,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 17:03:02,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:03:02,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:03:02,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:03:02,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:03:02,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:03:02,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:03:02,565 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:03:02,565 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:03:02,566 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:03:02,566 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:03:02,567 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:03:02,568 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:03:02,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 17:03:02,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 17:03:02,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:03:02,571 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:03:02,571 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 17:03:02,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:03:02,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:03:02,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:03:02,572 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 17:03:02,572 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 17:03:02,573 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 17:03:02,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:03:02,573 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:03:02,574 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:03:02,574 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:03:02,574 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:03:02,574 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:03:02,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:03:02,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:03:02,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:03:02,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:02,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:03:02,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:03:02,577 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:03:02,577 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:02,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:03:02,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:03:02,578 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_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea [2021-11-23 17:03:03,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:03:03,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:03:03,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:03:03,127 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:03:03,128 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:03:03,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/memsafety/lockfree-3.0.i [2021-11-23 17:03:03,209 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/data/98c479d31/c95d75b1a2af4b5d96444256bcdc67e6/FLAG4836d2cc8 [2021-11-23 17:03:04,030 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:03:04,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/sv-benchmarks/c/memsafety/lockfree-3.0.i [2021-11-23 17:03:04,049 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/data/98c479d31/c95d75b1a2af4b5d96444256bcdc67e6/FLAG4836d2cc8 [2021-11-23 17:03:04,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/data/98c479d31/c95d75b1a2af4b5d96444256bcdc67e6 [2021-11-23 17:03:04,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:03:04,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:03:04,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:04,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:03:04,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:03:04,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:04,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c600d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04, skipping insertion in model container [2021-11-23 17:03:04,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:04,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:03:04,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:03:04,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:04,774 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:03:04,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:04,896 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:03:04,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04 WrapperNode [2021-11-23 17:03:04,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:04,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:04,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:03:04,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:03:04,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:04,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:05,000 INFO L137 Inliner]: procedures = 128, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 114 [2021-11-23 17:03:05,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:05,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:03:05,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:03:05,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:03:05,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:05,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:05,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:05,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:05,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:05,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:05,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:05,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:03:05,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:03:05,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:03:05,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:03:05,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (1/1) ... [2021-11-23 17:03:05,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:05,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:05,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:03:05,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:03:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:03:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:03:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:03:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 17:03:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 17:03:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:03:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:03:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:03:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:03:05,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:03:05,290 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:03:05,292 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:03:05,914 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:03:05,922 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:03:05,927 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 17:03:05,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:03:05 BoogieIcfgContainer [2021-11-23 17:03:05,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:03:05,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:03:05,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:03:05,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:03:05,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:03:04" (1/3) ... [2021-11-23 17:03:05,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d3ee95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:03:05, skipping insertion in model container [2021-11-23 17:03:05,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:04" (2/3) ... [2021-11-23 17:03:05,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d3ee95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:03:05, skipping insertion in model container [2021-11-23 17:03:05,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:03:05" (3/3) ... [2021-11-23 17:03:05,942 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.0.i [2021-11-23 17:03:05,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:03:05,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-23 17:03:06,018 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:03:06,031 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 17:03:06,031 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-23 17:03:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 41 states have (on average 1.951219512195122) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 17:03:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 17:03:06,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:06,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 17:03:06,074 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:06,083 INFO L85 PathProgramCache]: Analyzing trace with hash 28701640, now seen corresponding path program 1 times [2021-11-23 17:03:06,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:06,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977227450] [2021-11-23 17:03:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:06,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:06,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:06,106 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:06,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:03:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:06,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:03:06,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:06,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:06,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:06,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977227450] [2021-11-23 17:03:06,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977227450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:06,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:06,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:03:06,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950671654] [2021-11-23 17:03:06,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:06,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:06,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:06,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:06,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:06,440 INFO L87 Difference]: Start difference. First operand has 62 states, 41 states have (on average 1.951219512195122) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 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), 2 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 17:03:06,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:06,557 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2021-11-23 17:03:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:06,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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 17:03:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:06,576 INFO L225 Difference]: With dead ends: 107 [2021-11-23 17:03:06,576 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 17:03:06,578 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 17:03:06,583 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 63 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:06,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:03:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 17:03:06,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2021-11-23 17:03:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 86 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 17:03:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 129 transitions. [2021-11-23 17:03:06,658 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 129 transitions. Word has length 5 [2021-11-23 17:03:06,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:06,660 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 129 transitions. [2021-11-23 17:03:06,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 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 17:03:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 129 transitions. [2021-11-23 17:03:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:03:06,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:06,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:03:06,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:06,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:06,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:06,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:06,879 INFO L85 PathProgramCache]: Analyzing trace with hash 889749439, now seen corresponding path program 1 times [2021-11-23 17:03:06,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:06,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079752834] [2021-11-23 17:03:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:06,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:06,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:06,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:06,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:03:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:06,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:06,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:06,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:06,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079752834] [2021-11-23 17:03:06,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079752834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:06,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:06,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:03:06,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493122896] [2021-11-23 17:03:06,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:06,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:06,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:06,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:06,988 INFO L87 Difference]: Start difference. First operand 87 states and 129 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 17:03:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:07,155 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2021-11-23 17:03:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:07,156 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 17:03:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:07,158 INFO L225 Difference]: With dead ends: 163 [2021-11-23 17:03:07,159 INFO L226 Difference]: Without dead ends: 160 [2021-11-23 17:03:07,159 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 17:03:07,161 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 62 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:07,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 116 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:03:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-23 17:03:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2021-11-23 17:03:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 120 states have (on average 1.9083333333333334) internal successors, (229), 139 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 17:03:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 229 transitions. [2021-11-23 17:03:07,184 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 229 transitions. Word has length 6 [2021-11-23 17:03:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:07,184 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 229 transitions. [2021-11-23 17:03:07,185 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 17:03:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 229 transitions. [2021-11-23 17:03:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:03:07,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:07,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:03:07,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:07,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:07,399 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:07,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:07,400 INFO L85 PathProgramCache]: Analyzing trace with hash 889692424, now seen corresponding path program 1 times [2021-11-23 17:03:07,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:07,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973904709] [2021-11-23 17:03:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:07,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:07,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:07,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:07,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:03:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:07,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:03:07,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:07,610 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 17:03:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:07,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:07,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:07,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973904709] [2021-11-23 17:03:07,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973904709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:07,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:07,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:03:07,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035485224] [2021-11-23 17:03:07,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:07,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:07,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:07,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:07,637 INFO L87 Difference]: Start difference. First operand 140 states and 229 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 17:03:07,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:07,838 INFO L93 Difference]: Finished difference Result 213 states and 331 transitions. [2021-11-23 17:03:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:07,840 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 17:03:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:07,843 INFO L225 Difference]: With dead ends: 213 [2021-11-23 17:03:07,843 INFO L226 Difference]: Without dead ends: 213 [2021-11-23 17:03:07,843 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 17:03:07,845 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 66 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:07,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 163 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:03:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-23 17:03:07,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2021-11-23 17:03:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 172 states have (on average 1.8372093023255813) internal successors, (316), 189 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 17:03:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 316 transitions. [2021-11-23 17:03:07,866 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 316 transitions. Word has length 6 [2021-11-23 17:03:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:07,867 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 316 transitions. [2021-11-23 17:03:07,867 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 17:03:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 316 transitions. [2021-11-23 17:03:07,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:03:07,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:07,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:03:07,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:08,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:08,081 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:08,081 INFO L85 PathProgramCache]: Analyzing trace with hash 889692425, now seen corresponding path program 1 times [2021-11-23 17:03:08,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:08,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459824262] [2021-11-23 17:03:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:08,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:08,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:08,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:08,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:03:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:03:08,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:08,170 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 17:03:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:08,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:08,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:08,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459824262] [2021-11-23 17:03:08,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459824262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:08,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:08,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:03:08,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927962341] [2021-11-23 17:03:08,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:08,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:08,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:08,187 INFO L87 Difference]: Start difference. First operand 190 states and 316 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 17:03:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:08,386 INFO L93 Difference]: Finished difference Result 208 states and 322 transitions. [2021-11-23 17:03:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:08,387 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 17:03:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:08,389 INFO L225 Difference]: With dead ends: 208 [2021-11-23 17:03:08,389 INFO L226 Difference]: Without dead ends: 208 [2021-11-23 17:03:08,390 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 17:03:08,391 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 65 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 170 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 17:03:08,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 170 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:03:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-23 17:03:08,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 188. [2021-11-23 17:03:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 172 states have (on average 1.7906976744186047) internal successors, (308), 187 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 17:03:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 308 transitions. [2021-11-23 17:03:08,417 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 308 transitions. Word has length 6 [2021-11-23 17:03:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:08,418 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 308 transitions. [2021-11-23 17:03:08,418 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 17:03:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 308 transitions. [2021-11-23 17:03:08,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:03:08,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:08,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:08,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:08,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:08,633 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:08,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:08,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1810669365, now seen corresponding path program 1 times [2021-11-23 17:03:08,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:08,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390386969] [2021-11-23 17:03:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:08,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:08,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:08,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:08,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:03:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:03:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:08,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:08,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:08,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390386969] [2021-11-23 17:03:08,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390386969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:08,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:08,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:08,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513593604] [2021-11-23 17:03:08,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:08,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:03:08,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:08,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:03:08,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:03:08,717 INFO L87 Difference]: Start difference. First operand 188 states and 308 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 17:03:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:08,764 INFO L93 Difference]: Finished difference Result 211 states and 304 transitions. [2021-11-23 17:03:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:03:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-23 17:03:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:08,767 INFO L225 Difference]: With dead ends: 211 [2021-11-23 17:03:08,767 INFO L226 Difference]: Without dead ends: 211 [2021-11-23 17:03:08,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 17:03:08,769 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 101 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:08,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 229 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:03:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-23 17:03:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 144. [2021-11-23 17:03:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 143 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 17:03:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 229 transitions. [2021-11-23 17:03:08,781 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 229 transitions. Word has length 7 [2021-11-23 17:03:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:08,781 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 229 transitions. [2021-11-23 17:03:08,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 17:03:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 229 transitions. [2021-11-23 17:03:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:03:08,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:08,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:08,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 17:03:09,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:09,019 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:09,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:09,019 INFO L85 PathProgramCache]: Analyzing trace with hash 347531241, now seen corresponding path program 1 times [2021-11-23 17:03:09,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:09,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338285550] [2021-11-23 17:03:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:09,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:09,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:09,021 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:09,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:03:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:09,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:03:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:09,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:09,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338285550] [2021-11-23 17:03:09,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338285550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:09,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:09,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:09,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635749003] [2021-11-23 17:03:09,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:09,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:03:09,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:09,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:03:09,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:03:09,093 INFO L87 Difference]: Start difference. First operand 144 states and 229 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 17:03:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:09,140 INFO L93 Difference]: Finished difference Result 283 states and 430 transitions. [2021-11-23 17:03:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:03:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-23 17:03:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:09,143 INFO L225 Difference]: With dead ends: 283 [2021-11-23 17:03:09,143 INFO L226 Difference]: Without dead ends: 283 [2021-11-23 17:03:09,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 17:03:09,145 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 103 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:09,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 196 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:03:09,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-23 17:03:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 198. [2021-11-23 17:03:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.6559139784946237) internal successors, (308), 197 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 17:03:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2021-11-23 17:03:09,157 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 8 [2021-11-23 17:03:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:09,158 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2021-11-23 17:03:09,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 17:03:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2021-11-23 17:03:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:03:09,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:09,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:09,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:09,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:09,379 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -527615340, now seen corresponding path program 1 times [2021-11-23 17:03:09,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:09,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518909217] [2021-11-23 17:03:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:09,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:09,381 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:09,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:03:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:09,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:03:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:09,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:09,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:09,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518909217] [2021-11-23 17:03:09,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518909217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:09,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2093691869] [2021-11-23 17:03:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:09,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:09,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:09,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:09,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:03:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:03:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:09,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:09,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2093691869] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:09,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535454736] [2021-11-23 17:03:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:09,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:09,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:09,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:09,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 17:03:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:09,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:03:09,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:09,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:09,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535454736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:09,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:09,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-23 17:03:09,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961226608] [2021-11-23 17:03:09,940 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:09,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:03:09,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:09,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:03:09,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:03:09,944 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 17:03:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:10,253 INFO L93 Difference]: Finished difference Result 811 states and 1238 transitions. [2021-11-23 17:03:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 17:03:10,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 12 [2021-11-23 17:03:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:10,259 INFO L225 Difference]: With dead ends: 811 [2021-11-23 17:03:10,260 INFO L226 Difference]: Without dead ends: 811 [2021-11-23 17:03:10,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:03:10,261 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 545 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:10,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 833 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:03:10,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-11-23 17:03:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 438. [2021-11-23 17:03:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 426 states have (on average 1.619718309859155) internal successors, (690), 437 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 17:03:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 690 transitions. [2021-11-23 17:03:10,288 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 690 transitions. Word has length 12 [2021-11-23 17:03:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:10,288 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 690 transitions. [2021-11-23 17:03:10,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 17:03:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 690 transitions. [2021-11-23 17:03:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:03:10,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:10,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:10,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:10,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:10,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-23 17:03:10,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:10,907 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2027186576, now seen corresponding path program 1 times [2021-11-23 17:03:10,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:10,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049816843] [2021-11-23 17:03:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:10,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:10,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:10,910 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:10,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:03:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:10,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:03:10,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:11,026 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 17:03:11,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:11,077 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 17:03:11,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:11,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049816843] [2021-11-23 17:03:11,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049816843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:11,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [912985031] [2021-11-23 17:03:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:11,078 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:11,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:11,082 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:11,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:03:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:11,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:03:11,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:11,226 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 17:03:11,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:11,261 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 17:03:11,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [912985031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:11,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308453772] [2021-11-23 17:03:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:11,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:11,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:11,263 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:11,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 17:03:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:11,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:03:11,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:11,383 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 17:03:11,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:11,414 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 17:03:11,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308453772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:11,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:11,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 5 [2021-11-23 17:03:11,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308673548] [2021-11-23 17:03:11,415 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:11,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:03:11,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:11,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:03:11,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:03:11,417 INFO L87 Difference]: Start difference. First operand 438 states and 690 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 17:03:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:11,475 INFO L93 Difference]: Finished difference Result 1016 states and 1552 transitions. [2021-11-23 17:03:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:03:11,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 12 [2021-11-23 17:03:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:11,483 INFO L225 Difference]: With dead ends: 1016 [2021-11-23 17:03:11,483 INFO L226 Difference]: Without dead ends: 1016 [2021-11-23 17:03:11,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:11,484 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 244 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:11,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 298 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:03:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-11-23 17:03:11,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 992. [2021-11-23 17:03:11,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 980 states have (on average 1.583673469387755) internal successors, (1552), 991 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states 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 17:03:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1552 transitions. [2021-11-23 17:03:11,515 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1552 transitions. Word has length 12 [2021-11-23 17:03:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:11,515 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1552 transitions. [2021-11-23 17:03:11,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 17:03:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1552 transitions. [2021-11-23 17:03:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 17:03:11,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:11,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:11,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:11,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:11,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:12,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:12,120 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:12,120 INFO L85 PathProgramCache]: Analyzing trace with hash -480845608, now seen corresponding path program 1 times [2021-11-23 17:03:12,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:12,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251947962] [2021-11-23 17:03:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:12,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:12,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:12,122 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:12,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:03:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:12,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:12,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:12,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:12,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251947962] [2021-11-23 17:03:12,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251947962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:12,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1582048847] [2021-11-23 17:03:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:12,375 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:12,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:12,379 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:12,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:03:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:12,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:12,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:12,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1582048847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:12,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990978316] [2021-11-23 17:03:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:12,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:12,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:12,663 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:12,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:03:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:12,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:12,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:12,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:12,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990978316] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:12,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:12,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-11-23 17:03:12,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062979974] [2021-11-23 17:03:12,865 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:12,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:03:12,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:12,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:03:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:03:12,868 INFO L87 Difference]: Start difference. First operand 992 states and 1552 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 17:03:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:12,955 INFO L93 Difference]: Finished difference Result 1263 states and 1901 transitions. [2021-11-23 17:03:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:03:12,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 17:03:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:12,964 INFO L225 Difference]: With dead ends: 1263 [2021-11-23 17:03:12,964 INFO L226 Difference]: Without dead ends: 1263 [2021-11-23 17:03:12,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 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 17:03:12,966 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 102 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:12,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 167 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:03:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-11-23 17:03:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1120. [2021-11-23 17:03:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1108 states have (on average 1.536101083032491) internal successors, (1702), 1119 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states 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 17:03:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1702 transitions. [2021-11-23 17:03:13,005 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1702 transitions. Word has length 18 [2021-11-23 17:03:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:13,005 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1702 transitions. [2021-11-23 17:03:13,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 17:03:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1702 transitions. [2021-11-23 17:03:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 17:03:13,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:13,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:13,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:13,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:13,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:13,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:13,623 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:13,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1323238580, now seen corresponding path program 1 times [2021-11-23 17:03:13,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:13,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809404653] [2021-11-23 17:03:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:13,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:13,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:13,625 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:13,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:03:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:13,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:03:13,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:13,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:13,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:13,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809404653] [2021-11-23 17:03:13,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809404653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:13,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2051880495] [2021-11-23 17:03:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:13,820 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:13,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:13,821 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:13,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:03:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:03:13,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:13,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:14,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2051880495] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:14,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951261480] [2021-11-23 17:03:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:14,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:14,015 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:14,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:03:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:14,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:03:14,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:14,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:14,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951261480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:14,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:14,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-23 17:03:14,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622478621] [2021-11-23 17:03:14,221 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:14,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:03:14,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:14,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:03:14,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:03:14,222 INFO L87 Difference]: Start difference. First operand 1120 states and 1702 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 17:03:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:14,516 INFO L93 Difference]: Finished difference Result 1823 states and 2638 transitions. [2021-11-23 17:03:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 17:03:14,516 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 17:03:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:14,527 INFO L225 Difference]: With dead ends: 1823 [2021-11-23 17:03:14,528 INFO L226 Difference]: Without dead ends: 1823 [2021-11-23 17:03:14,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:03:14,529 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 649 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:14,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 984 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:03:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-11-23 17:03:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1081. [2021-11-23 17:03:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1069 states have (on average 1.519176800748363) internal successors, (1624), 1080 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 17:03:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1624 transitions. [2021-11-23 17:03:14,572 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1624 transitions. Word has length 21 [2021-11-23 17:03:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:14,573 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1624 transitions. [2021-11-23 17:03:14,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 17:03:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1624 transitions. [2021-11-23 17:03:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:03:14,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:14,575 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:14,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:14,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-23 17:03:14,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:15,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:15,177 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash -2049591299, now seen corresponding path program 1 times [2021-11-23 17:03:15,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:15,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663856885] [2021-11-23 17:03:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:15,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:15,179 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:15,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:03:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:15,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:03:15,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:03:15,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:15,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663856885] [2021-11-23 17:03:15,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663856885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:15,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [192875057] [2021-11-23 17:03:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:15,479 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:15,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:15,483 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:15,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:03:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:15,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:15,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:03:15,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:03:15,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [192875057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:15,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385866257] [2021-11-23 17:03:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:15,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:15,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:15,774 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:15,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 17:03:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:15,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 17:03:15,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:15,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385866257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:15,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:03:15,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-23 17:03:15,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630162849] [2021-11-23 17:03:15,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:15,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:03:15,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:15,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:03:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:03:15,965 INFO L87 Difference]: Start difference. First operand 1081 states and 1624 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 17:03:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:16,026 INFO L93 Difference]: Finished difference Result 1319 states and 1974 transitions. [2021-11-23 17:03:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:03:16,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 17:03:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:16,034 INFO L225 Difference]: With dead ends: 1319 [2021-11-23 17:03:16,035 INFO L226 Difference]: Without dead ends: 1319 [2021-11-23 17:03:16,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:03:16,036 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 64 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:16,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 201 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:03:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-11-23 17:03:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1197. [2021-11-23 17:03:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1185 states have (on average 1.5181434599156118) internal successors, (1799), 1196 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states 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 17:03:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1799 transitions. [2021-11-23 17:03:16,088 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1799 transitions. Word has length 30 [2021-11-23 17:03:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:16,088 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1799 transitions. [2021-11-23 17:03:16,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 17:03:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1799 transitions. [2021-11-23 17:03:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:03:16,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:16,090 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:16,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:16,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:16,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:16,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:16,708 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash -134919915, now seen corresponding path program 1 times [2021-11-23 17:03:16,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:16,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433570157] [2021-11-23 17:03:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:16,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:16,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:16,711 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:16,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:03:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:16,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:03:16,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:03:17,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:17,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433570157] [2021-11-23 17:03:17,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433570157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:17,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [870216685] [2021-11-23 17:03:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:17,001 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:17,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:17,003 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:17,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 17:03:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:17,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:17,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:03:17,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:03:17,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [870216685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:17,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418601607] [2021-11-23 17:03:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:17,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:17,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:17,266 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:17,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 17:03:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:03:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:17,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:17,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418601607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:17,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:17,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 13 [2021-11-23 17:03:17,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326161496] [2021-11-23 17:03:17,586 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:17,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:03:17,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:03:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:03:17,588 INFO L87 Difference]: Start difference. First operand 1197 states and 1799 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 17:03:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:18,203 INFO L93 Difference]: Finished difference Result 3756 states and 5481 transitions. [2021-11-23 17:03:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 17:03:18,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 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 17:03:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:18,226 INFO L225 Difference]: With dead ends: 3756 [2021-11-23 17:03:18,226 INFO L226 Difference]: Without dead ends: 3756 [2021-11-23 17:03:18,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:03:18,227 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 2336 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2336 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:18,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2336 Valid, 1193 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:03:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2021-11-23 17:03:18,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 2478. [2021-11-23 17:03:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2466 states have (on average 1.494728304947283) internal successors, (3686), 2477 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states 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 17:03:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3686 transitions. [2021-11-23 17:03:18,309 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3686 transitions. Word has length 30 [2021-11-23 17:03:18,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:18,309 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 3686 transitions. [2021-11-23 17:03:18,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 17:03:18,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3686 transitions. [2021-11-23 17:03:18,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 17:03:18,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:18,311 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:18,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:18,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:18,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:18,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:18,931 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:18,932 INFO L85 PathProgramCache]: Analyzing trace with hash 971894434, now seen corresponding path program 1 times [2021-11-23 17:03:18,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:18,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989066974] [2021-11-23 17:03:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:18,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:18,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:18,934 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:18,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:03:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:03:19,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:03:19,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:19,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989066974] [2021-11-23 17:03:19,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989066974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:19,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1191289637] [2021-11-23 17:03:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:19,186 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:19,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:19,188 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:19,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 17:03:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:19,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:19,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:03:19,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:03:19,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1191289637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:19,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110283343] [2021-11-23 17:03:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:19,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:19,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:19,499 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:19,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 17:03:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:19,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:19,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:19,602 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 17:03:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:03:19,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:03:19,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110283343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:19,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:19,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 4, 4] total 10 [2021-11-23 17:03:19,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735551127] [2021-11-23 17:03:19,852 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:19,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:03:19,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:19,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:03:19,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:03:19,853 INFO L87 Difference]: Start difference. First operand 2478 states and 3686 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:22,393 INFO L93 Difference]: Finished difference Result 9543 states and 14328 transitions. [2021-11-23 17:03:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 17:03:22,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 17:03:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:22,448 INFO L225 Difference]: With dead ends: 9543 [2021-11-23 17:03:22,449 INFO L226 Difference]: Without dead ends: 9543 [2021-11-23 17:03:22,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 249 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=367, Invalid=1795, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 17:03:22,451 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 990 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:22,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [990 Valid, 1180 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 17:03:22,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9543 states. [2021-11-23 17:03:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9543 to 6617. [2021-11-23 17:03:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6617 states, 6606 states have (on average 1.5158946412352408) internal successors, (10014), 6616 states have internal predecessors, (10014), 0 states have call successors, (0), 0 states 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 17:03:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6617 states to 6617 states and 10014 transitions. [2021-11-23 17:03:22,682 INFO L78 Accepts]: Start accepts. Automaton has 6617 states and 10014 transitions. Word has length 39 [2021-11-23 17:03:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:22,683 INFO L470 AbstractCegarLoop]: Abstraction has 6617 states and 10014 transitions. [2021-11-23 17:03:22,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 6617 states and 10014 transitions. [2021-11-23 17:03:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 17:03:22,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:22,685 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:22,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:22,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:23,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-23 17:03:23,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:23,287 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:23,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1822753242, now seen corresponding path program 1 times [2021-11-23 17:03:23,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:23,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313133697] [2021-11-23 17:03:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:23,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:23,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:23,289 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:23,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:03:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:23,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:03:23,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:23,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:23,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:23,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313133697] [2021-11-23 17:03:23,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313133697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:23,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1452053366] [2021-11-23 17:03:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:23,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:23,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:23,677 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:23,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-23 17:03:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:23,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:03:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:23,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:24,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1452053366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:24,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66875349] [2021-11-23 17:03:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:24,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:24,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:24,041 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:24,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 17:03:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:24,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:03:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:24,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:24,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66875349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:24,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:24,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:03:24,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628930129] [2021-11-23 17:03:24,451 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:24,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:03:24,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:03:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:03:24,452 INFO L87 Difference]: Start difference. First operand 6617 states and 10014 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 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 17:03:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:25,292 INFO L93 Difference]: Finished difference Result 10931 states and 16562 transitions. [2021-11-23 17:03:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 17:03:25,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 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 41 [2021-11-23 17:03:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:25,352 INFO L225 Difference]: With dead ends: 10931 [2021-11-23 17:03:25,352 INFO L226 Difference]: Without dead ends: 10931 [2021-11-23 17:03:25,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=430, Invalid=1826, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 17:03:25,354 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 1986 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:25,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 2247 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:03:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10931 states. [2021-11-23 17:03:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10931 to 7404. [2021-11-23 17:03:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7404 states, 7393 states have (on average 1.5112944677397537) internal successors, (11173), 7403 states have internal predecessors, (11173), 0 states have call successors, (0), 0 states 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 17:03:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7404 states to 7404 states and 11173 transitions. [2021-11-23 17:03:25,663 INFO L78 Accepts]: Start accepts. Automaton has 7404 states and 11173 transitions. Word has length 41 [2021-11-23 17:03:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:25,664 INFO L470 AbstractCegarLoop]: Abstraction has 7404 states and 11173 transitions. [2021-11-23 17:03:25,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 15 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 17:03:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 7404 states and 11173 transitions. [2021-11-23 17:03:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 17:03:25,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:25,667 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:25,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:25,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:26,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-23 17:03:26,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:26,287 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash 34201258, now seen corresponding path program 1 times [2021-11-23 17:03:26,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:26,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070694804] [2021-11-23 17:03:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:26,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:26,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:26,291 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:26,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:03:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:26,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:03:26,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 17:03:26,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 17:03:26,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:26,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070694804] [2021-11-23 17:03:26,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070694804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:26,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [76992863] [2021-11-23 17:03:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:26,632 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:26,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:26,633 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:26,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-23 17:03:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:26,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:03:26,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 17:03:26,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 17:03:27,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [76992863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:27,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065012816] [2021-11-23 17:03:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:27,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:27,056 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:27,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 17:03:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:27,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:03:27,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 17:03:27,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 17:03:27,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065012816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:27,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:27,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2021-11-23 17:03:27,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657705177] [2021-11-23 17:03:27,417 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:27,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:03:27,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:03:27,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:03:27,419 INFO L87 Difference]: Start difference. First operand 7404 states and 11173 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 17:03:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:27,573 INFO L93 Difference]: Finished difference Result 7409 states and 11103 transitions. [2021-11-23 17:03:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:03:27,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 50 [2021-11-23 17:03:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:27,592 INFO L225 Difference]: With dead ends: 7409 [2021-11-23 17:03:27,592 INFO L226 Difference]: Without dead ends: 7409 [2021-11-23 17:03:27,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 293 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 17:03:27,596 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 108 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:27,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 158 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:03:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2021-11-23 17:03:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 7404. [2021-11-23 17:03:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7404 states, 7393 states have (on average 1.501826051670499) internal successors, (11103), 7403 states have internal predecessors, (11103), 0 states have call successors, (0), 0 states 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 17:03:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7404 states to 7404 states and 11103 transitions. [2021-11-23 17:03:27,778 INFO L78 Accepts]: Start accepts. Automaton has 7404 states and 11103 transitions. Word has length 50 [2021-11-23 17:03:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:27,778 INFO L470 AbstractCegarLoop]: Abstraction has 7404 states and 11103 transitions. [2021-11-23 17:03:27,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 17:03:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 7404 states and 11103 transitions. [2021-11-23 17:03:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 17:03:27,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:27,781 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:27,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:27,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-23 17:03:28,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-23 17:03:28,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:28,393 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:28,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:28,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1339034764, now seen corresponding path program 1 times [2021-11-23 17:03:28,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:28,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345500257] [2021-11-23 17:03:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:28,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:28,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:28,395 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:28,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:03:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:28,523 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 17:03:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:03:28,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:03:29,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:29,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345500257] [2021-11-23 17:03:29,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345500257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:29,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1526814691] [2021-11-23 17:03:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:29,487 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:29,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:29,500 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:29,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-23 17:03:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:29,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:29,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:29,700 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 17:03:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:03:29,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:03:30,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1526814691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:30,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740079509] [2021-11-23 17:03:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:30,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:30,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:30,437 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:30,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 17:03:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:30,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:30,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:30,559 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 17:03:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:03:30,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:03:31,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740079509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:31,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:31,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-23 17:03:31,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115148019] [2021-11-23 17:03:31,318 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:31,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:03:31,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:31,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:03:31,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:03:31,319 INFO L87 Difference]: Start difference. First operand 7404 states and 11103 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:32,240 INFO L93 Difference]: Finished difference Result 12129 states and 17905 transitions. [2021-11-23 17:03:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:03:32,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-23 17:03:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:32,267 INFO L225 Difference]: With dead ends: 12129 [2021-11-23 17:03:32,267 INFO L226 Difference]: Without dead ends: 12129 [2021-11-23 17:03:32,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:03:32,268 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 445 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:32,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 320 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 17:03:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12129 states. [2021-11-23 17:03:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12129 to 10720. [2021-11-23 17:03:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10720 states, 10709 states have (on average 1.495471099075544) internal successors, (16015), 10719 states have internal predecessors, (16015), 0 states have call successors, (0), 0 states 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 17:03:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10720 states to 10720 states and 16015 transitions. [2021-11-23 17:03:32,472 INFO L78 Accepts]: Start accepts. Automaton has 10720 states and 16015 transitions. Word has length 53 [2021-11-23 17:03:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:32,473 INFO L470 AbstractCegarLoop]: Abstraction has 10720 states and 16015 transitions. [2021-11-23 17:03:32,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 10720 states and 16015 transitions. [2021-11-23 17:03:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:03:32,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:32,476 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 4, 4, 3, 3, 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 17:03:32,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:32,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-23 17:03:32,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-23 17:03:33,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:33,079 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:33,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:33,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1485538747, now seen corresponding path program 1 times [2021-11-23 17:03:33,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:33,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80118560] [2021-11-23 17:03:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:33,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:33,081 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:33,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 17:03:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:33,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:33,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 17:03:33,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 17:03:33,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:33,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80118560] [2021-11-23 17:03:33,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80118560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:33,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [522522057] [2021-11-23 17:03:33,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:33,566 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:33,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:33,571 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:33,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-23 17:03:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:33,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:03:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 17:03:33,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 17:03:34,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [522522057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:34,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905238797] [2021-11-23 17:03:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:34,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:34,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:34,088 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:34,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 17:03:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:34,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:03:34,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 17:03:34,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 17:03:34,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905238797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:34,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:34,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 6, 6, 6] total 14 [2021-11-23 17:03:34,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122759857] [2021-11-23 17:03:34,563 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:34,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 17:03:34,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 17:03:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:03:34,564 INFO L87 Difference]: Start difference. First operand 10720 states and 16015 transitions. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 14 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 17:03:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:35,205 INFO L93 Difference]: Finished difference Result 29828 states and 42606 transitions. [2021-11-23 17:03:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 17:03:35,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 17:03:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:35,273 INFO L225 Difference]: With dead ends: 29828 [2021-11-23 17:03:35,274 INFO L226 Difference]: Without dead ends: 29828 [2021-11-23 17:03:35,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:03:35,276 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1165 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:35,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 1217 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:03:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29828 states. [2021-11-23 17:03:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29828 to 20704. [2021-11-23 17:03:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20704 states, 20693 states have (on average 1.4639249987918619) internal successors, (30293), 20703 states have internal predecessors, (30293), 0 states have call successors, (0), 0 states 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 17:03:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20704 states to 20704 states and 30293 transitions. [2021-11-23 17:03:35,798 INFO L78 Accepts]: Start accepts. Automaton has 20704 states and 30293 transitions. Word has length 65 [2021-11-23 17:03:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:35,799 INFO L470 AbstractCegarLoop]: Abstraction has 20704 states and 30293 transitions. [2021-11-23 17:03:35,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 14 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 17:03:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 20704 states and 30293 transitions. [2021-11-23 17:03:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:03:35,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:35,804 INFO L514 BasicCegarLoop]: trace histogram [11, 6, 6, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:35,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:36,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:36,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:36,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:36,417 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:36,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1309989099, now seen corresponding path program 1 times [2021-11-23 17:03:36,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:36,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022599724] [2021-11-23 17:03:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:36,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:36,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:36,419 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:36,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 17:03:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:36,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:03:36,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 55 proven. 83 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-23 17:03:36,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 55 proven. 83 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-23 17:03:37,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:37,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022599724] [2021-11-23 17:03:37,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022599724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:37,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1910126152] [2021-11-23 17:03:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:37,370 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:37,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:37,371 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:37,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-23 17:03:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:37,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:03:37,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 17:03:37,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:37,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1910126152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:37,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:03:37,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 16 [2021-11-23 17:03:37,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808172294] [2021-11-23 17:03:37,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:37,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:37,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:03:37,712 INFO L87 Difference]: Start difference. First operand 20704 states and 30293 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 17:03:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:37,846 INFO L93 Difference]: Finished difference Result 25688 states and 37138 transitions. [2021-11-23 17:03:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:37,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 82 [2021-11-23 17:03:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:37,905 INFO L225 Difference]: With dead ends: 25688 [2021-11-23 17:03:37,905 INFO L226 Difference]: Without dead ends: 25688 [2021-11-23 17:03:37,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:03:37,906 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 50 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:37,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 137 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:03:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25688 states. [2021-11-23 17:03:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25688 to 24798. [2021-11-23 17:03:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24798 states, 24787 states have (on average 1.4489450114979627) internal successors, (35915), 24797 states have internal predecessors, (35915), 0 states have call successors, (0), 0 states 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 17:03:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24798 states to 24798 states and 35915 transitions. [2021-11-23 17:03:38,598 INFO L78 Accepts]: Start accepts. Automaton has 24798 states and 35915 transitions. Word has length 82 [2021-11-23 17:03:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:38,598 INFO L470 AbstractCegarLoop]: Abstraction has 24798 states and 35915 transitions. [2021-11-23 17:03:38,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 17:03:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 24798 states and 35915 transitions. [2021-11-23 17:03:38,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 17:03:38,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:38,619 INFO L514 BasicCegarLoop]: trace histogram [11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:38,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:38,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:39,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:39,020 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:39,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1674253856, now seen corresponding path program 1 times [2021-11-23 17:03:39,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:39,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915854968] [2021-11-23 17:03:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:39,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:39,023 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:39,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 17:03:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:39,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:03:39,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 55 proven. 86 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-23 17:03:39,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 55 proven. 86 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-23 17:03:40,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915854968] [2021-11-23 17:03:40,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915854968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:40,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [124423405] [2021-11-23 17:03:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:40,329 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:40,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:40,330 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:40,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-23 17:03:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:40,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:03:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 55 proven. 96 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 17:03:40,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 55 proven. 86 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-23 17:03:41,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [124423405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:41,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294492694] [2021-11-23 17:03:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:41,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:41,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:41,048 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:41,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 17:03:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 88 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:03:41,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:03:41,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294492694] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:03:41,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:03:41,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 10, 9, 8, 7] total 29 [2021-11-23 17:03:41,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769920049] [2021-11-23 17:03:41,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:41,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:03:41,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:41,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:03:41,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-11-23 17:03:41,483 INFO L87 Difference]: Start difference. First operand 24798 states and 35915 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:41,803 INFO L93 Difference]: Finished difference Result 61006 states and 86130 transitions. [2021-11-23 17:03:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:03:41,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-23 17:03:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:41,899 INFO L225 Difference]: With dead ends: 61006 [2021-11-23 17:03:41,899 INFO L226 Difference]: Without dead ends: 61006 [2021-11-23 17:03:41,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 17:03:41,901 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 209 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:41,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 342 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:03:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61006 states. [2021-11-23 17:03:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61006 to 37820. [2021-11-23 17:03:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37820 states, 37809 states have (on average 1.4424343410299134) internal successors, (54537), 37819 states have internal predecessors, (54537), 0 states have call successors, (0), 0 states 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 17:03:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37820 states to 37820 states and 54537 transitions. [2021-11-23 17:03:42,822 INFO L78 Accepts]: Start accepts. Automaton has 37820 states and 54537 transitions. Word has length 84 [2021-11-23 17:03:42,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:42,823 INFO L470 AbstractCegarLoop]: Abstraction has 37820 states and 54537 transitions. [2021-11-23 17:03:42,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 37820 states and 54537 transitions. [2021-11-23 17:03:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 17:03:42,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:42,835 INFO L514 BasicCegarLoop]: trace histogram [11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:42,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:43,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-23 17:03:43,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:43,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:43,450 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash -160581693, now seen corresponding path program 1 times [2021-11-23 17:03:43,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:43,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791493861] [2021-11-23 17:03:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:43,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:43,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:43,453 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:43,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 17:03:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:43,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:03:43,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:43,613 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 17:03:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:03:43,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:03:44,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:44,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791493861] [2021-11-23 17:03:44,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791493861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:44,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [31494477] [2021-11-23 17:03:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:44,037 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:44,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:44,039 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:44,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-23 17:03:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:44,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:03:44,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:44,348 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 17:03:44,348 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 21 [2021-11-23 17:03:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 115 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 17:03:45,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 115 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 17:03:45,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [31494477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:45,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537280805] [2021-11-23 17:03:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:45,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:45,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:45,818 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:45,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-23 17:03:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:45,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:03:45,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:45,979 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 17:03:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:03:46,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:03:46,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537280805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:46,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:46,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2021-11-23 17:03:46,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245819404] [2021-11-23 17:03:46,410 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:46,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 17:03:46,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:46,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 17:03:46,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:03:46,413 INFO L87 Difference]: Start difference. First operand 37820 states and 54537 transitions. Second operand has 11 states, 10 states have (on average 13.0) internal successors, (130), 11 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:46,939 INFO L93 Difference]: Finished difference Result 99914 states and 146278 transitions. [2021-11-23 17:03:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 17:03:46,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 13.0) internal successors, (130), 11 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 17:03:46,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:47,069 INFO L225 Difference]: With dead ends: 99914 [2021-11-23 17:03:47,069 INFO L226 Difference]: Without dead ends: 99914 [2021-11-23 17:03:47,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 501 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:03:47,070 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 296 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:47,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 1130 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 194 Unchecked, 0.2s Time] [2021-11-23 17:03:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99914 states. [2021-11-23 17:03:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99914 to 63245. [2021-11-23 17:03:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63245 states, 63234 states have (on average 1.4652876617009836) internal successors, (92656), 63244 states have internal predecessors, (92656), 0 states have call successors, (0), 0 states 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 17:03:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63245 states to 63245 states and 92656 transitions. [2021-11-23 17:03:48,625 INFO L78 Accepts]: Start accepts. Automaton has 63245 states and 92656 transitions. Word has length 87 [2021-11-23 17:03:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:48,626 INFO L470 AbstractCegarLoop]: Abstraction has 63245 states and 92656 transitions. [2021-11-23 17:03:48,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 13.0) internal successors, (130), 11 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 63245 states and 92656 transitions. [2021-11-23 17:03:48,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 17:03:48,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:48,640 INFO L514 BasicCegarLoop]: trace histogram [11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:48,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:48,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2021-11-23 17:03:49,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-23 17:03:49,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:49,253 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:49,254 INFO L85 PathProgramCache]: Analyzing trace with hash -160581692, now seen corresponding path program 1 times [2021-11-23 17:03:49,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:49,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626471931] [2021-11-23 17:03:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:49,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:49,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:49,256 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:49,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 17:03:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:49,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:03:49,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:49,416 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 17:03:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:03:49,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:03:50,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626471931] [2021-11-23 17:03:50,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626471931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1309632753] [2021-11-23 17:03:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:50,947 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:50,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:50,948 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:50,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-23 17:03:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:51,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:03:51,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:51,217 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 17:03:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 115 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 17:03:51,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 115 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 17:03:52,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1309632753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:52,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770355977] [2021-11-23 17:03:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:52,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:52,510 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:52,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-23 17:03:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:52,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:03:52,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:52,716 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 17:03:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:03:53,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:03:53,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770355977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:53,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:53,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-23 17:03:53,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611703164] [2021-11-23 17:03:53,863 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:53,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:03:53,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:03:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:03:53,865 INFO L87 Difference]: Start difference. First operand 63245 states and 92656 transitions. Second operand has 10 states, 9 states have (on average 14.88888888888889) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:56,618 INFO L93 Difference]: Finished difference Result 112414 states and 164456 transitions. [2021-11-23 17:03:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 17:03:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 14.88888888888889) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 17:03:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:56,901 INFO L225 Difference]: With dead ends: 112414 [2021-11-23 17:03:56,901 INFO L226 Difference]: Without dead ends: 112414 [2021-11-23 17:03:56,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-11-23 17:03:56,903 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 567 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:56,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 767 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 17:03:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112414 states. [2021-11-23 17:03:58,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112414 to 107278. [2021-11-23 17:03:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107278 states, 107267 states have (on average 1.4642527524774627) internal successors, (157066), 107277 states have internal predecessors, (157066), 0 states have call successors, (0), 0 states 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 17:03:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107278 states to 107278 states and 157066 transitions. [2021-11-23 17:03:58,694 INFO L78 Accepts]: Start accepts. Automaton has 107278 states and 157066 transitions. Word has length 87 [2021-11-23 17:03:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:58,695 INFO L470 AbstractCegarLoop]: Abstraction has 107278 states and 157066 transitions. [2021-11-23 17:03:58,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 14.88888888888889) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 107278 states and 157066 transitions. [2021-11-23 17:03:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 17:03:58,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:58,705 INFO L514 BasicCegarLoop]: trace histogram [11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:58,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:58,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:59,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-23 17:03:59,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:59,309 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:03:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:59,309 INFO L85 PathProgramCache]: Analyzing trace with hash -683066588, now seen corresponding path program 1 times [2021-11-23 17:03:59,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:59,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239043149] [2021-11-23 17:03:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:59,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:59,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:59,311 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:59,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 17:03:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:59,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:03:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:03:59,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:03:59,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239043149] [2021-11-23 17:03:59,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239043149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1537540233] [2021-11-23 17:03:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:59,811 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:59,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:59,812 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:59,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-23 17:04:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:04:00,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 115 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 17:04:00,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 115 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 17:04:00,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1537540233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390643860] [2021-11-23 17:04:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:00,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:00,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:04:00,430 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:04:00,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-23 17:04:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:04:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:04:00,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:04:00,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390643860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:00,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:04:00,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2021-11-23 17:04:00,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589368736] [2021-11-23 17:04:00,989 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:04:00,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:04:00,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:00,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:04:00,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:04:00,990 INFO L87 Difference]: Start difference. First operand 107278 states and 157066 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 17:04:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:02,196 INFO L93 Difference]: Finished difference Result 110096 states and 160853 transitions. [2021-11-23 17:04:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:04:02,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 88 [2021-11-23 17:04:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:02,343 INFO L225 Difference]: With dead ends: 110096 [2021-11-23 17:04:02,343 INFO L226 Difference]: Without dead ends: 110096 [2021-11-23 17:04:02,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:04:02,344 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 347 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:02,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 470 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 17:04:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110096 states. [2021-11-23 17:04:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110096 to 100704. [2021-11-23 17:04:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100704 states, 100693 states have (on average 1.4581947106551598) internal successors, (146830), 100703 states have internal predecessors, (146830), 0 states have call successors, (0), 0 states 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 17:04:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100704 states to 100704 states and 146830 transitions. [2021-11-23 17:04:04,124 INFO L78 Accepts]: Start accepts. Automaton has 100704 states and 146830 transitions. Word has length 88 [2021-11-23 17:04:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:04,125 INFO L470 AbstractCegarLoop]: Abstraction has 100704 states and 146830 transitions. [2021-11-23 17:04:04,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 17:04:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 100704 states and 146830 transitions. [2021-11-23 17:04:04,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 17:04:04,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:04,136 INFO L514 BasicCegarLoop]: trace histogram [11, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:04,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:04,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-11-23 17:04:04,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:04,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:04,763 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:04:04,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:04,764 INFO L85 PathProgramCache]: Analyzing trace with hash 704457896, now seen corresponding path program 1 times [2021-11-23 17:04:04,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:04,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441749876] [2021-11-23 17:04:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:04,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:04,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:04,766 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:04,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-23 17:04:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:04,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:04:04,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:04:05,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:04:05,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:05,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441749876] [2021-11-23 17:04:05,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441749876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:05,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1850344971] [2021-11-23 17:04:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:05,664 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:05,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:04:05,666 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:04:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-11-23 17:04:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:05,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:04:05,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 115 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 17:04:06,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 115 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 17:04:06,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1850344971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:06,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274259931] [2021-11-23 17:04:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:06,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:06,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:04:06,320 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:04:06,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-23 17:04:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:06,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:04:06,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:04:06,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 106 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 17:04:06,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274259931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:06,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:04:06,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2021-11-23 17:04:06,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809296364] [2021-11-23 17:04:06,919 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:04:06,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 17:04:06,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:06,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 17:04:06,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:04:06,920 INFO L87 Difference]: Start difference. First operand 100704 states and 146830 transitions. Second operand has 11 states, 10 states have (on average 13.2) internal successors, (132), 11 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 17:04:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:09,427 INFO L93 Difference]: Finished difference Result 105721 states and 153865 transitions. [2021-11-23 17:04:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 17:04:09,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 13.2) internal successors, (132), 11 states have internal predecessors, (132), 0 states have call successors, (0), 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 90 [2021-11-23 17:04:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:09,566 INFO L225 Difference]: With dead ends: 105721 [2021-11-23 17:04:09,566 INFO L226 Difference]: Without dead ends: 105721 [2021-11-23 17:04:09,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=420, Invalid=986, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 17:04:09,567 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1254 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:09,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1254 Valid, 660 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 17:04:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105721 states. [2021-11-23 17:04:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105721 to 100705. [2021-11-23 17:04:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100705 states, 100694 states have (on average 1.458190160287604) internal successors, (146831), 100704 states have internal predecessors, (146831), 0 states have call successors, (0), 0 states 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 17:04:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100705 states to 100705 states and 146831 transitions. [2021-11-23 17:04:11,562 INFO L78 Accepts]: Start accepts. Automaton has 100705 states and 146831 transitions. Word has length 90 [2021-11-23 17:04:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:11,562 INFO L470 AbstractCegarLoop]: Abstraction has 100705 states and 146831 transitions. [2021-11-23 17:04:11,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 13.2) internal successors, (132), 11 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 17:04:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 100705 states and 146831 transitions. [2021-11-23 17:04:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 17:04:11,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:11,573 INFO L514 BasicCegarLoop]: trace histogram [12, 7, 7, 6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:11,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:11,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:11,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:12,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:12,187 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:04:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:12,188 INFO L85 PathProgramCache]: Analyzing trace with hash 807910577, now seen corresponding path program 1 times [2021-11-23 17:04:12,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:12,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746546633] [2021-11-23 17:04:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:12,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:12,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:12,190 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:12,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-23 17:04:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:04:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 56 proven. 119 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 17:04:12,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 56 proven. 119 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 17:04:12,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:12,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746546633] [2021-11-23 17:04:12,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746546633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:12,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1602418274] [2021-11-23 17:04:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:13,000 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:13,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:04:13,001 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:04:13,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-23 17:04:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:13,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:04:13,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 56 proven. 119 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 17:04:13,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 56 proven. 119 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 17:04:13,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1602418274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371448689] [2021-11-23 17:04:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:13,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:13,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:04:13,639 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:04:13,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-23 17:04:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:04:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:13,784 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 17:04:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 29 proven. 133 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-23 17:04:14,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 29 proven. 133 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-23 17:04:14,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371448689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:14,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:04:14,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 5, 5] total 29 [2021-11-23 17:04:14,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086582770] [2021-11-23 17:04:14,304 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:04:14,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 17:04:14,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:14,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 17:04:14,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-11-23 17:04:14,305 INFO L87 Difference]: Start difference. First operand 100705 states and 146831 transitions. Second operand has 29 states, 29 states have (on average 8.379310344827585) internal successors, (243), 29 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 17:04:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:33,519 INFO L93 Difference]: Finished difference Result 159879 states and 227418 transitions. [2021-11-23 17:04:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-11-23 17:04:33,520 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 8.379310344827585) internal successors, (243), 29 states have internal predecessors, (243), 0 states have call successors, (0), 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 90 [2021-11-23 17:04:33,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:33,723 INFO L225 Difference]: With dead ends: 159879 [2021-11-23 17:04:33,723 INFO L226 Difference]: Without dead ends: 159879 [2021-11-23 17:04:33,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 783 SyntacticMatches, 3 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54301 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=15248, Invalid=104122, Unknown=0, NotChecked=0, Total=119370 [2021-11-23 17:04:33,745 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 14183 mSDsluCounter, 3455 mSDsCounter, 0 mSdLazyCounter, 4403 mSolverCounterSat, 1290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14183 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 5693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1290 IncrementalHoareTripleChecker+Valid, 4403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:33,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14183 Valid, 3800 Invalid, 5693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1290 Valid, 4403 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-23 17:04:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159879 states. [2021-11-23 17:04:35,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159879 to 71214. [2021-11-23 17:04:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71214 states, 71204 states have (on average 1.4107915285658108) internal successors, (100454), 71213 states have internal predecessors, (100454), 0 states have call successors, (0), 0 states 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 17:04:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71214 states to 71214 states and 100454 transitions. [2021-11-23 17:04:35,561 INFO L78 Accepts]: Start accepts. Automaton has 71214 states and 100454 transitions. Word has length 90 [2021-11-23 17:04:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:35,561 INFO L470 AbstractCegarLoop]: Abstraction has 71214 states and 100454 transitions. [2021-11-23 17:04:35,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.379310344827585) internal successors, (243), 29 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 17:04:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 71214 states and 100454 transitions. [2021-11-23 17:04:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 17:04:35,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:35,567 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:35,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:35,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:35,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-23 17:04:36,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:36,171 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:04:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash 143187548, now seen corresponding path program 2 times [2021-11-23 17:04:36,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600745464] [2021-11-23 17:04:36,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:04:36,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:36,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:36,174 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:36,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-23 17:04:36,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:04:36,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:04:36,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:04:36,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 92 proven. 83 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 17:04:36,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 92 proven. 83 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 17:04:37,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600745464] [2021-11-23 17:04:37,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600745464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [25263319] [2021-11-23 17:04:37,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:04:37,194 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:37,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:04:37,215 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:04:37,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-11-23 17:04:37,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:04:37,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:04:37,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:04:37,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 92 proven. 93 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 17:04:37,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 92 proven. 83 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 17:04:37,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [25263319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:37,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583549647] [2021-11-23 17:04:37,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:04:37,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:37,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:04:37,873 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:04:37,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-23 17:04:38,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:04:38,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:04:38,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:04:38,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 92 proven. 83 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 17:04:38,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 92 proven. 83 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 17:04:38,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583549647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:38,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:04:38,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 22 [2021-11-23 17:04:38,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491646460] [2021-11-23 17:04:38,341 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:04:38,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 17:04:38,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:38,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 17:04:38,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-11-23 17:04:38,343 INFO L87 Difference]: Start difference. First operand 71214 states and 100454 transitions. Second operand has 23 states, 23 states have (on average 7.3478260869565215) internal successors, (169), 22 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 17:04:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:39,353 INFO L93 Difference]: Finished difference Result 124680 states and 170681 transitions. [2021-11-23 17:04:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 17:04:39,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.3478260869565215) internal successors, (169), 22 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 90 [2021-11-23 17:04:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:39,508 INFO L225 Difference]: With dead ends: 124680 [2021-11-23 17:04:39,508 INFO L226 Difference]: Without dead ends: 124680 [2021-11-23 17:04:39,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 17:04:39,509 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 2546 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2546 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:39,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2546 Valid, 1856 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:04:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124680 states. [2021-11-23 17:04:40,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124680 to 91946. [2021-11-23 17:04:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91946 states, 91936 states have (on average 1.3824399582318134) internal successors, (127096), 91945 states have internal predecessors, (127096), 0 states have call successors, (0), 0 states 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 17:04:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91946 states to 91946 states and 127096 transitions. [2021-11-23 17:04:41,218 INFO L78 Accepts]: Start accepts. Automaton has 91946 states and 127096 transitions. Word has length 90 [2021-11-23 17:04:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:41,218 INFO L470 AbstractCegarLoop]: Abstraction has 91946 states and 127096 transitions. [2021-11-23 17:04:41,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.3478260869565215) internal successors, (169), 22 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 17:04:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 91946 states and 127096 transitions. [2021-11-23 17:04:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 17:04:41,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:41,222 INFO L514 BasicCegarLoop]: trace histogram [13, 8, 7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:41,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:41,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-23 17:04:41,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:41,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:41,823 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-23 17:04:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2003137351, now seen corresponding path program 1 times [2021-11-23 17:04:41,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:41,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867830036] [2021-11-23 17:04:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:41,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:41,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:41,826 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:41,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-23 17:04:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:42,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:04:42,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:42,138 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 17:04:42,148 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 17:04:42,422 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 19 treesize of output 7 [2021-11-23 17:04:42,426 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 19 treesize of output 7 [2021-11-23 17:04:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 67 proven. 142 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 17:04:42,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 46 proven. 163 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 17:04:43,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:43,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867830036] [2021-11-23 17:04:43,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867830036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:43,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2114837730] [2021-11-23 17:04:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:43,156 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:04:43,158 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:04:43,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2021-11-23 17:04:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:43,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:04:43,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:43,705 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 17:04:43,713 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 17:04:44,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:04:44,056 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 19 treesize of output 23 [2021-11-23 17:04:44,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:04:44,074 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 19 treesize of output 23 [2021-11-23 17:04:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 52 proven. 183 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 17:04:44,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 46 proven. 175 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 17:04:45,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2114837730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:45,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260203900] [2021-11-23 17:04:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:45,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:45,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:04:45,549 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:04:45,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77289ac1-8899-4a00-aa7c-c1e1cdeb3986/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-23 17:04:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:45,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:04:45,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:45,902 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 17:04:45,908 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 17:04:46,175 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 17:04:46,186 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 17:04:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 52 proven. 189 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:04:46,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 46 proven. 181 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 17:04:46,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260203900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:46,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:04:46,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 10, 9] total 24 [2021-11-23 17:04:46,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592462221] [2021-11-23 17:04:46,790 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:04:46,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 17:04:46,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:46,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 17:04:46,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-11-23 17:04:46,792 INFO L87 Difference]: Start difference. First operand 91946 states and 127096 transitions. Second operand has 25 states, 25 states have (on average 8.44) internal successors, (211), 24 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 17:05:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:49,526 INFO L93 Difference]: Finished difference Result 2654567 states and 3691683 transitions. [2021-11-23 17:05:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 566 states. [2021-11-23 17:05:49,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.44) internal successors, (211), 24 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) Word has length 91 [2021-11-23 17:05:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:56,045 INFO L225 Difference]: With dead ends: 2654567 [2021-11-23 17:05:56,046 INFO L226 Difference]: Without dead ends: 2644464 [2021-11-23 17:05:56,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1088 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 571 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153442 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=25235, Invalid=302521, Unknown=0, NotChecked=0, Total=327756 [2021-11-23 17:05:56,060 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 6534 mSDsluCounter, 10901 mSDsCounter, 0 mSdLazyCounter, 5363 mSolverCounterSat, 1014 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6534 SdHoareTripleChecker+Valid, 11265 SdHoareTripleChecker+Invalid, 6377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1014 IncrementalHoareTripleChecker+Valid, 5363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:56,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6534 Valid, 11265 Invalid, 6377 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1014 Valid, 5363 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2021-11-23 17:05:58,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644464 states.