./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/iftelse.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/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_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/iftelse.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:02:53,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:02:53,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:02:53,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:02:53,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:02:53,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:02:53,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:02:53,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:02:53,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:02:53,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:02:53,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:02:53,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:02:53,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:02:53,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:02:53,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:02:53,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:02:53,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:02:53,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:02:53,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:02:53,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:02:53,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:02:53,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:02:53,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:02:53,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:02:53,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:02:53,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:02:53,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:02:53,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:02:53,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:02:53,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:02:53,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:02:53,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:02:53,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:02:53,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:02:53,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:02:53,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:02:53,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:02:53,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:02:53,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:02:53,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:02:53,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:02:53,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:02:53,470 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:02:53,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:02:53,471 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:02:53,471 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:02:53,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:02:53,472 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:02:53,473 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:02:53,473 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:02:53,473 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:02:53,474 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:02:53,475 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:02:53,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:02:53,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:02:53,476 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:02:53,476 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:02:53,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:02:53,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:02:53,477 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:02:53,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:02:53,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:02:53,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:02:53,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:02:53,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:02:53,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:02:53,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:02:53,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:02:53,481 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:02:53,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:02:53,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:02:53,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:02:53,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:02:53,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:02:53,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:02:53,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:02:53,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:02:53,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:02:53,485 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:02:53,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:02:53,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:02:53,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:02:53,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:02:53,486 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_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b [2021-11-23 17:02:53,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:02:53,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:02:53,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:02:53,883 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:02:53,884 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:02:53,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loops-crafted-1/iftelse.c [2021-11-23 17:02:53,999 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/data/561047bd7/07999bf83c8e40ddbd9f34bf61e49fcc/FLAG15bbe389e [2021-11-23 17:02:54,580 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:02:54,581 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/sv-benchmarks/c/loops-crafted-1/iftelse.c [2021-11-23 17:02:54,595 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/data/561047bd7/07999bf83c8e40ddbd9f34bf61e49fcc/FLAG15bbe389e [2021-11-23 17:02:54,905 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/data/561047bd7/07999bf83c8e40ddbd9f34bf61e49fcc [2021-11-23 17:02:54,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:02:54,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:02:54,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:02:54,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:02:54,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:02:54,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:02:54" (1/1) ... [2021-11-23 17:02:54,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74955a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:54, skipping insertion in model container [2021-11-23 17:02:54,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:02:54" (1/1) ... [2021-11-23 17:02:54,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:02:54,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:02:55,227 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2021-11-23 17:02:55,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:02:55,263 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:02:55,281 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2021-11-23 17:02:55,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:02:55,320 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:02:55,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55 WrapperNode [2021-11-23 17:02:55,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:02:55,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:02:55,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:02:55,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:02:55,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55" (1/1) ... [2021-11-23 17:02:55,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55" (1/1) ... [2021-11-23 17:02:55,369 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2021-11-23 17:02:55,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:02:55,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:02:55,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:02:55,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:02:55,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55" (1/1) ... [2021-11-23 17:02:55,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55" (1/1) ... [2021-11-23 17:02:55,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55" (1/1) ... [2021-11-23 17:02:55,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55" (1/1) ... [2021-11-23 17:02:55,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55" (1/1) ... [2021-11-23 17:02:55,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55" (1/1) ... [2021-11-23 17:02:55,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55" (1/1) ... [2021-11-23 17:02:55,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:02:55,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:02:55,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:02:55,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:02:55,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:55" (1/1) ... [2021-11-23 17:02:55,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:02:55,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:02:55,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:02:55,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:02:55,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:02:55,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:02:55,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:02:55,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:02:55,619 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:02:55,621 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:02:55,811 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:02:55,829 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 17:02:55,843 INFO L158 Benchmark]: Toolchain (without parser) took 930.00ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 48.7MB in the beginning and 81.5MB in the end (delta: -32.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:02:55,844 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 83.9MB. Free memory was 54.6MB in the beginning and 54.5MB in the end (delta: 29.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:02:55,847 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.66ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 48.5MB in the beginning and 93.3MB in the end (delta: -44.9MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2021-11-23 17:02:55,849 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.52ms. Allocated memory is still 117.4MB. Free memory was 93.3MB in the beginning and 91.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:02:55,851 INFO L158 Benchmark]: Boogie Preprocessor took 48.18ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 90.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:02:55,852 INFO L158 Benchmark]: RCFGBuilder took 417.28ms. Allocated memory is still 117.4MB. Free memory was 90.9MB in the beginning and 81.5MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:02:55,863 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 83.9MB. Free memory was 54.6MB in the beginning and 54.5MB in the end (delta: 29.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 399.66ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 48.5MB in the beginning and 93.3MB in the end (delta: -44.9MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.52ms. Allocated memory is still 117.4MB. Free memory was 93.3MB in the beginning and 91.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.18ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 90.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 417.28ms. Allocated memory is still 117.4MB. Free memory was 90.9MB in the beginning and 81.5MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. 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 17:02:55,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/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_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/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_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/iftelse.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:02:58,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:02:58,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:02:58,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:02:58,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:02:58,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:02:58,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:02:58,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:02:58,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:02:59,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:02:59,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:02:59,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:02:59,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:02:59,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:02:59,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:02:59,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:02:59,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:02:59,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:02:59,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:02:59,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:02:59,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:02:59,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:02:59,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:02:59,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:02:59,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:02:59,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:02:59,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:02:59,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:02:59,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:02:59,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:02:59,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:02:59,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:02:59,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:02:59,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:02:59,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:02:59,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:02:59,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:02:59,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:02:59,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:02:59,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:02:59,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:02:59,081 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:02:59,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:02:59,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:02:59,134 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:02:59,134 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:02:59,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:02:59,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:02:59,136 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:02:59,136 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:02:59,137 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:02:59,137 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:02:59,138 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:02:59,139 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:02:59,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:02:59,141 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:02:59,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:02:59,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:02:59,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:02:59,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:02:59,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:02:59,142 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:02:59,143 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:02:59,143 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:02:59,143 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:02:59,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:02:59,144 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:02:59,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:02:59,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:02:59,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:02:59,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:02:59,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:02:59,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:02:59,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:02:59,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:02:59,147 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:02:59,147 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:59,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:02:59,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:02:59,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:02:59,148 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_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b [2021-11-23 17:02:59,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:02:59,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:02:59,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:02:59,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:02:59,636 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:02:59,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loops-crafted-1/iftelse.c [2021-11-23 17:02:59,733 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/data/57249d2a3/13f6c745b3624e89a82a41c13221af3e/FLAG204b33d25 [2021-11-23 17:03:00,378 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:03:00,379 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/sv-benchmarks/c/loops-crafted-1/iftelse.c [2021-11-23 17:03:00,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/data/57249d2a3/13f6c745b3624e89a82a41c13221af3e/FLAG204b33d25 [2021-11-23 17:03:00,739 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/data/57249d2a3/13f6c745b3624e89a82a41c13221af3e [2021-11-23 17:03:00,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:03:00,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:03:00,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:00,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:03:00,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:03:00,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:00" (1/1) ... [2021-11-23 17:03:00,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c93cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:00, skipping insertion in model container [2021-11-23 17:03:00,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:00" (1/1) ... [2021-11-23 17:03:00,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:03:00,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:03:00,958 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2021-11-23 17:03:00,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:00,988 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:03:01,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2021-11-23 17:03:01,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:01,084 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:03:01,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01 WrapperNode [2021-11-23 17:03:01,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:01,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:01,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:03:01,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:03:01,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (1/1) ... [2021-11-23 17:03:01,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (1/1) ... [2021-11-23 17:03:01,129 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2021-11-23 17:03:01,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:01,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:03:01,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:03:01,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:03:01,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (1/1) ... [2021-11-23 17:03:01,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (1/1) ... [2021-11-23 17:03:01,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (1/1) ... [2021-11-23 17:03:01,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (1/1) ... [2021-11-23 17:03:01,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (1/1) ... [2021-11-23 17:03:01,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (1/1) ... [2021-11-23 17:03:01,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (1/1) ... [2021-11-23 17:03:01,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:03:01,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:03:01,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:03:01,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:03:01,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (1/1) ... [2021-11-23 17:03:01,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:01,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:01,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:03:01,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:03:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:03:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:03:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:03:01,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:03:01,339 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:03:01,341 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:03:01,477 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:03:01,485 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:03:01,485 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:03:01,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:03:01 BoogieIcfgContainer [2021-11-23 17:03:01,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:03:01,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:03:01,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:03:01,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:03:01,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:03:00" (1/3) ... [2021-11-23 17:03:01,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f11b73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:03:01, skipping insertion in model container [2021-11-23 17:03:01,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:01" (2/3) ... [2021-11-23 17:03:01,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f11b73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:03:01, skipping insertion in model container [2021-11-23 17:03:01,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:03:01" (3/3) ... [2021-11-23 17:03:01,498 INFO L111 eAbstractionObserver]: Analyzing ICFG iftelse.c [2021-11-23 17:03:01,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:03:01,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:03:01,566 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:03:01,597 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:03:01,597 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:03:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:03:01,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:01,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:01,661 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash 183324244, now seen corresponding path program 1 times [2021-11-23 17:03:01,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:01,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759461686] [2021-11-23 17:03:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:01,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:01,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:01,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:01,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:03:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:01,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:01,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:02,184 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 17:03:02,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:02,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:02,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759461686] [2021-11-23 17:03:02,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759461686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:02,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:02,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 17:03:02,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248358871] [2021-11-23 17:03:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:02,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:03:02,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:02,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:03:02,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:03:02,257 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 17:03:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:02,486 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-11-23 17:03:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:03:02,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 17:03:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:02,502 INFO L225 Difference]: With dead ends: 51 [2021-11-23 17:03:02,503 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 17:03:02,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:02,524 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:02,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 89 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:03:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 17:03:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-11-23 17:03:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-23 17:03:02,579 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-11-23 17:03:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:02,580 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 17:03:02,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 17:03:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-23 17:03:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:03:02,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:02,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:02,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:02,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:02,783 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1425053575, now seen corresponding path program 1 times [2021-11-23 17:03:02,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:02,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946668971] [2021-11-23 17:03:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:02,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:02,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:02,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:02,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:03:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:02,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:02,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:02,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:02,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:02,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946668971] [2021-11-23 17:03:02,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946668971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:02,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:02,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:02,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119087877] [2021-11-23 17:03:02,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:02,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:02,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:02,991 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:03,005 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-11-23 17:03:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:03,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:03:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:03,007 INFO L225 Difference]: With dead ends: 21 [2021-11-23 17:03:03,007 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 17:03:03,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:03,010 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:03,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:03:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 17:03:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-23 17:03:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-23 17:03:03,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-11-23 17:03:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:03,017 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-23 17:03:03,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-23 17:03:03,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 17:03:03,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:03,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:03,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:03,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:03,233 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:03,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2117156515, now seen corresponding path program 1 times [2021-11-23 17:03:03,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:03,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764175581] [2021-11-23 17:03:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:03,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:03,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:03,236 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:03,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:03:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:03,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:03:03,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:03,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:03,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:03,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764175581] [2021-11-23 17:03:03,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764175581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:03,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1525917526] [2021-11-23 17:03:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:03,447 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:03,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:03,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:03,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:03:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:03,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:03:03,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:03,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:03,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1525917526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:03,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111600212] [2021-11-23 17:03:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:03,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:03,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:03,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:03:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:03,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:03:03,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:03,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:03,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111600212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:03,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:03,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 7 [2021-11-23 17:03:03,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797541994] [2021-11-23 17:03:03,908 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:03,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:03:03,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:03,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:03:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:03,911 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 17:03:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:03,982 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-11-23 17:03:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:03:03,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 13 [2021-11-23 17:03:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:03,984 INFO L225 Difference]: With dead ends: 37 [2021-11-23 17:03:03,984 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 17:03:03,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:03,987 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:03,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 48 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:03:03,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 17:03:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2021-11-23 17:03:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 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 17:03:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-23 17:03:04,002 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2021-11-23 17:03:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:04,003 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-23 17:03:04,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 17:03:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-23 17:03:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 17:03:04,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:04,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:04,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:04,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:03:04,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:04,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:04,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2117216097, now seen corresponding path program 1 times [2021-11-23 17:03:04,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:04,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82057730] [2021-11-23 17:03:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:04,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:04,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:04,614 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:04,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:03:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:04,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:03:04,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:04,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:05,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:05,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82057730] [2021-11-23 17:03:05,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82057730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:05,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376855374] [2021-11-23 17:03:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:05,135 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:05,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:05,138 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:05,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:03:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:03:05,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:05,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:05,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1376855374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:05,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526589645] [2021-11-23 17:03:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:05,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:05,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:05,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:03:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:05,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:03:05,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:05,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:06,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526589645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:06,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:06,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 9] total 22 [2021-11-23 17:03:06,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209637268] [2021-11-23 17:03:06,477 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:06,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 17:03:06,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 17:03:06,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:03:06,481 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:07,679 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-11-23 17:03:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 17:03:07,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 17:03:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:07,682 INFO L225 Difference]: With dead ends: 42 [2021-11-23 17:03:07,683 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 17:03:07,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 17:03:07,685 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:07,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:03:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 17:03:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-11-23 17:03:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-11-23 17:03:07,707 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 13 [2021-11-23 17:03:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:07,708 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-11-23 17:03:07,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-11-23 17:03:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 17:03:07,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:07,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:07,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:07,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:08,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:08,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:08,313 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:08,314 INFO L85 PathProgramCache]: Analyzing trace with hash -683997770, now seen corresponding path program 2 times [2021-11-23 17:03:08,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:08,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723998501] [2021-11-23 17:03:08,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:03:08,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:08,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:08,316 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:08,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:03:08,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:03:08,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:03:08,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:03:08,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:08,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:09,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:09,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723998501] [2021-11-23 17:03:09,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723998501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:09,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [569953455] [2021-11-23 17:03:09,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:03:09,119 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:09,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:09,122 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:09,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:03:09,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:03:09,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:03:09,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:03:09,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:09,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:10,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [569953455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124576709] [2021-11-23 17:03:10,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:03:10,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:10,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:10,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:10,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:03:10,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:03:10,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:03:10,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:03:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:10,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:13,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124576709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:13,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:13,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 11, 12] total 35 [2021-11-23 17:03:13,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552947668] [2021-11-23 17:03:13,124 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:13,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 17:03:13,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 17:03:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 17:03:13,127 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:23,003 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-11-23 17:03:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 17:03:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 17:03:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:23,006 INFO L225 Difference]: With dead ends: 59 [2021-11-23 17:03:23,006 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 17:03:23,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=848, Invalid=3058, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 17:03:23,010 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 233 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:23,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 125 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 17:03:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 17:03:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-11-23 17:03:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-23 17:03:23,025 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 18 [2021-11-23 17:03:23,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:23,026 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-23 17:03:23,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-23 17:03:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 17:03:23,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:23,028 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 1, 1, 1, 1, 1] [2021-11-23 17:03:23,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:23,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:23,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:23,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:23,638 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1469978013, now seen corresponding path program 3 times [2021-11-23 17:03:23,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:23,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994909737] [2021-11-23 17:03:23,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:03:23,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:23,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:23,646 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:23,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:03:23,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:03:23,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:03:23,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:03:23,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:03:25,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:03:35,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:35,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994909737] [2021-11-23 17:03:35,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994909737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:35,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [490446364] [2021-11-23 17:03:35,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:03:35,968 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:35,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:35,969 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:35,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:03:36,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:03:36,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:03:36,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:03:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:03:36,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:03:43,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [490446364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:43,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009953077] [2021-11-23 17:03:43,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:03:43,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:43,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:43,456 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:43,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 17:03:43,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:03:43,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:03:43,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:03:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:03:44,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:03:50,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009953077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:50,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:50,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 25 [2021-11-23 17:03:50,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304894547] [2021-11-23 17:03:50,284 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:50,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 17:03:50,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:50,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 17:03:50,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-11-23 17:03:50,286 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:55,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:55,367 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-11-23 17:03:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 17:03:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-23 17:03:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:55,371 INFO L225 Difference]: With dead ends: 51 [2021-11-23 17:03:55,371 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 17:03:55,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=335, Invalid=1071, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 17:03:55,373 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:55,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 116 Invalid, 0 Unknown, 15 Unchecked, 1.3s Time] [2021-11-23 17:03:55,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 17:03:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-23 17:03:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-11-23 17:03:55,397 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 33 [2021-11-23 17:03:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:55,398 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-11-23 17:03:55,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-11-23 17:03:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 17:03:55,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:55,404 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 4, 1, 1, 1, 1, 1] [2021-11-23 17:03:55,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:55,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:55,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:56,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:56,030 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash 541506780, now seen corresponding path program 4 times [2021-11-23 17:03:56,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:56,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183868085] [2021-11-23 17:03:56,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:03:56,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:56,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:56,033 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:56,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:03:56,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:03:56,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:03:56,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:03:56,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:56,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:59,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:59,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183868085] [2021-11-23 17:03:59,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183868085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:59,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [124046361] [2021-11-23 17:03:59,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:03:59,041 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:59,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:59,043 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:59,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:03:59,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:03:59,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:03:59,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:03:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:59,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:59,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [124046361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:59,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301408327] [2021-11-23 17:03:59,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:03:59,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:59,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:59,677 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:59,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:03:59,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:03:59,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:03:59,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:03:59,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 3 proven. 154 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:04:00,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 1 proven. 156 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:04:05,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301408327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:05,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:04:05,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 13, 13] total 53 [2021-11-23 17:04:05,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740748882] [2021-11-23 17:04:05,825 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:04:05,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 17:04:05,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 17:04:05,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=2214, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 17:04:05,829 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:03,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:03,211 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-11-23 17:05:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 17:05:03,211 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 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 48 [2021-11-23 17:05:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:03,213 INFO L225 Difference]: With dead ends: 105 [2021-11-23 17:05:03,213 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 17:05:03,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 243 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=1610, Invalid=5693, Unknown=7, NotChecked=0, Total=7310 [2021-11-23 17:05:03,217 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 353 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:03,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 363 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 774 Invalid, 0 Unknown, 428 Unchecked, 0.8s Time] [2021-11-23 17:05:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 17:05:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2021-11-23 17:05:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-23 17:05:03,238 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 48 [2021-11-23 17:05:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:03,238 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-23 17:05:03,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:03,239 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-23 17:05:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 17:05:03,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:03,242 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 10, 9, 1, 1, 1, 1, 1] [2021-11-23 17:05:03,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:03,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:03,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:03,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:03,846 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:03,847 INFO L85 PathProgramCache]: Analyzing trace with hash 90941126, now seen corresponding path program 5 times [2021-11-23 17:05:03,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:03,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857833089] [2021-11-23 17:05:03,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:05:03,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:03,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:03,849 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:03,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:05:04,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-23 17:05:04,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:05:04,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 17:05:04,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:06,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:17,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:17,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857833089] [2021-11-23 17:05:17,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857833089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:17,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [233853262] [2021-11-23 17:05:17,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:05:17,172 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:17,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:05:17,179 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:05:17,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:05:17,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-23 17:05:17,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:05:17,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 17:05:17,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:20,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:56,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [233853262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:56,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905755030] [2021-11-23 17:05:56,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:05:56,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:05:56,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:05:56,157 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:05:56,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab56dd60-938f-47e0-9bb4-b6f2a2f41dd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:05:56,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-23 17:05:56,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:05:56,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:05:56,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:06:01,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:07:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:07:03,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905755030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:07:03,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:07:03,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 33, 35, 36, 36, 38] total 193 [2021-11-23 17:07:03,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935498241] [2021-11-23 17:07:03,375 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:07:03,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-23 17:07:03,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:03,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-23 17:07:03,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9100, Invalid=27956, Unknown=0, NotChecked=0, Total=37056 [2021-11-23 17:07:03,396 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 193 states, 193 states have (on average 2.844559585492228) internal successors, (549), 193 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:32,431 WARN L227 SmtUtils]: Spent 18.50s on a formula simplification. DAG size of input: 210 DAG size of output: 143 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:08:08,604 WARN L227 SmtUtils]: Spent 21.38s on a formula simplification. DAG size of input: 186 DAG size of output: 172 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:08:26,277 WARN L227 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 159 DAG size of output: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:09:05,112 WARN L227 SmtUtils]: Spent 18.17s on a formula simplification. DAG size of input: 162 DAG size of output: 153 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:09:27,843 WARN L227 SmtUtils]: Spent 14.45s on a formula simplification. DAG size of input: 175 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:09:53,975 WARN L227 SmtUtils]: Spent 15.47s on a formula simplification. DAG size of input: 172 DAG size of output: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:10:20,655 WARN L227 SmtUtils]: Spent 16.05s on a formula simplification. DAG size of input: 175 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:10:49,591 WARN L227 SmtUtils]: Spent 11.57s on a formula simplification. DAG size of input: 160 DAG size of output: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:11:05,295 WARN L227 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 149 DAG size of output: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:11:21,978 WARN L227 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 149 DAG size of output: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:11:50,236 WARN L227 SmtUtils]: Spent 14.12s on a formula simplification. DAG size of input: 149 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:12:10,595 WARN L227 SmtUtils]: Spent 10.37s on a formula simplification. DAG size of input: 162 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:12:37,090 WARN L227 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 159 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:13:05,379 WARN L227 SmtUtils]: Spent 11.56s on a formula simplification. DAG size of input: 162 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:13:30,206 WARN L227 SmtUtils]: Spent 8.93s on a formula simplification. DAG size of input: 145 DAG size of output: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:13:58,496 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 139 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:14:24,607 WARN L227 SmtUtils]: Spent 13.28s on a formula simplification. DAG size of input: 135 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:14:47,797 WARN L227 SmtUtils]: Spent 10.83s on a formula simplification. DAG size of input: 144 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:15:21,238 WARN L227 SmtUtils]: Spent 9.31s on a formula simplification. DAG size of input: 141 DAG size of output: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:15:51,224 WARN L227 SmtUtils]: Spent 10.27s on a formula simplification. DAG size of input: 144 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:16:09,354 WARN L227 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 125 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:16:51,768 WARN L227 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 123 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)