./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d8d47521066b64c3dd20752926e1ed0f109f71af24dbe7d1255c7f065d546fba --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:54:13,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:54:13,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:54:13,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:54:13,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:54:13,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:54:13,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:54:13,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:54:13,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:54:13,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:54:13,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:54:13,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:54:13,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:54:13,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:54:13,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:54:13,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:54:13,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:54:13,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:54:13,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:54:13,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:54:13,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:54:13,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:54:13,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:54:13,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:54:13,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:54:13,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:54:13,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:54:13,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:54:13,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:54:13,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:54:13,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:54:13,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:54:13,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:54:13,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:54:13,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:54:13,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:54:13,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:54:13,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:54:13,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:54:13,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:54:13,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:54:13,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 20:54:13,527 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:54:13,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:54:13,528 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:54:13,528 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:54:13,529 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:54:13,529 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:54:13,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:54:13,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:54:13,530 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:54:13,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:54:13,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:54:13,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:54:13,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:54:13,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:54:13,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:54:13,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:54:13,533 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:54:13,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:54:13,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:54:13,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:54:13,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:54:13,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:54:13,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:54:13,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:54:13,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:54:13,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:54:13,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:54:13,535 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:54:13,536 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:54:13,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:54:13,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8d47521066b64c3dd20752926e1ed0f109f71af24dbe7d1255c7f065d546fba [2022-11-18 20:54:13,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:54:13,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:54:13,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:54:13,842 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:54:13,843 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:54:13,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c [2022-11-18 20:54:13,917 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/data/76c405826/6322bb21473246e5b75df695868e1e93/FLAGcc315d005 [2022-11-18 20:54:14,443 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:54:14,446 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c [2022-11-18 20:54:14,458 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/data/76c405826/6322bb21473246e5b75df695868e1e93/FLAGcc315d005 [2022-11-18 20:54:14,706 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/data/76c405826/6322bb21473246e5b75df695868e1e93 [2022-11-18 20:54:14,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:54:14,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:54:14,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:54:14,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:54:14,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:54:14,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:54:14" (1/1) ... [2022-11-18 20:54:14,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dcf09b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:14, skipping insertion in model container [2022-11-18 20:54:14,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:54:14" (1/1) ... [2022-11-18 20:54:14,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:54:14,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:54:14,956 WARN L234 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_5894598c-2392-4261-98f2-ce9c063ded60/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c[1014,1027] [2022-11-18 20:54:15,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:54:15,321 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:54:15,331 WARN L234 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_5894598c-2392-4261-98f2-ce9c063ded60/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.2.prop1-back-serstep.c[1014,1027] [2022-11-18 20:54:15,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:54:15,471 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:54:15,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15 WrapperNode [2022-11-18 20:54:15,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:54:15,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:54:15,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:54:15,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:54:15,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,711 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2207 [2022-11-18 20:54:15,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:54:15,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:54:15,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:54:15,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:54:15,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,844 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:54:15,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:54:15,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:54:15,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:54:15,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (1/1) ... [2022-11-18 20:54:15,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:54:15,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:15,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:54:15,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:54:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:54:15,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:54:16,339 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:54:16,341 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:54:18,771 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:54:18,782 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:54:18,782 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:54:18,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:54:18 BoogieIcfgContainer [2022-11-18 20:54:18,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:54:18,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:54:18,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:54:18,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:54:18,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:54:14" (1/3) ... [2022-11-18 20:54:18,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cffacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:54:18, skipping insertion in model container [2022-11-18 20:54:18,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:54:15" (2/3) ... [2022-11-18 20:54:18,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cffacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:54:18, skipping insertion in model container [2022-11-18 20:54:18,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:54:18" (3/3) ... [2022-11-18 20:54:18,794 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.protocols.2.prop1-back-serstep.c [2022-11-18 20:54:18,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:54:18,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:54:18,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:54:18,912 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@130e9683, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:54:18,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:54:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 380 states, 378 states have (on average 1.6613756613756614) internal successors, (628), 379 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-18 20:54:18,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:18,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:18,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:54:18,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash 321110608, now seen corresponding path program 1 times [2022-11-18 20:54:18,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:18,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445460320] [2022-11-18 20:54:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:18,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:20,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:20,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445460320] [2022-11-18 20:54:20,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445460320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:54:20,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:54:20,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:54:20,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478848006] [2022-11-18 20:54:20,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:54:20,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:54:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:20,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:54:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:54:20,138 INFO L87 Difference]: Start difference. First operand has 380 states, 378 states have (on average 1.6613756613756614) internal successors, (628), 379 states have internal predecessors, (628), 0 states have call successors, (0), 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 4 states, 4 states have (on average 24.75) internal successors, (99), 4 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) [2022-11-18 20:54:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:20,525 INFO L93 Difference]: Finished difference Result 1267 states and 2107 transitions. [2022-11-18 20:54:20,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:54:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 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) Word has length 99 [2022-11-18 20:54:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:20,556 INFO L225 Difference]: With dead ends: 1267 [2022-11-18 20:54:20,567 INFO L226 Difference]: Without dead ends: 889 [2022-11-18 20:54:20,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:54:20,575 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 1842 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1842 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:20,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1842 Valid, 1938 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:54:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-11-18 20:54:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 378. [2022-11-18 20:54:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.6551724137931034) internal successors, (624), 377 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 624 transitions. [2022-11-18 20:54:20,695 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 624 transitions. Word has length 99 [2022-11-18 20:54:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:20,696 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 624 transitions. [2022-11-18 20:54:20,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 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) [2022-11-18 20:54:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 624 transitions. [2022-11-18 20:54:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-18 20:54:20,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:20,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:20,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:54:20,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:54:20,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1366219768, now seen corresponding path program 1 times [2022-11-18 20:54:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:20,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655909910] [2022-11-18 20:54:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:20,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:21,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:21,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655909910] [2022-11-18 20:54:21,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655909910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:54:21,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:54:21,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:54:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655622186] [2022-11-18 20:54:21,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:54:21,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:54:21,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:54:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:54:21,453 INFO L87 Difference]: Start difference. First operand 378 states and 624 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:21,953 INFO L93 Difference]: Finished difference Result 1493 states and 2474 transitions. [2022-11-18 20:54:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:54:21,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2022-11-18 20:54:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:21,958 INFO L225 Difference]: With dead ends: 1493 [2022-11-18 20:54:21,959 INFO L226 Difference]: Without dead ends: 1117 [2022-11-18 20:54:21,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:54:21,962 INFO L413 NwaCegarLoop]: 849 mSDtfsCounter, 1518 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:21,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1518 Valid, 2082 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:54:21,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-18 20:54:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 518. [2022-11-18 20:54:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 1.6557059961315281) internal successors, (856), 517 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 856 transitions. [2022-11-18 20:54:21,984 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 856 transitions. Word has length 100 [2022-11-18 20:54:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:21,985 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 856 transitions. [2022-11-18 20:54:21,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 856 transitions. [2022-11-18 20:54:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-11-18 20:54:21,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:21,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:21,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:54:21,994 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:54:21,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:21,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1078187665, now seen corresponding path program 1 times [2022-11-18 20:54:21,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:21,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141545012] [2022-11-18 20:54:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:21,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:35,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:35,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141545012] [2022-11-18 20:54:35,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141545012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:35,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521145006] [2022-11-18 20:54:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:35,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:35,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:35,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:54:35,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:54:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:36,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2802 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 20:54:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:42,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:49,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521145006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:49,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:54:49,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 11] total 24 [2022-11-18 20:54:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514667840] [2022-11-18 20:54:49,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:49,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:54:49,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:54:49,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:54:49,609 INFO L87 Difference]: Start difference. First operand 518 states and 856 transitions. Second operand has 24 states, 24 states have (on average 43.375) internal successors, (1041), 24 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:01,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:01,468 INFO L93 Difference]: Finished difference Result 3548 states and 5871 transitions. [2022-11-18 20:55:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 20:55:01,469 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 43.375) internal successors, (1041), 24 states have internal predecessors, (1041), 0 states have call successors, (0), 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 349 [2022-11-18 20:55:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:01,481 INFO L225 Difference]: With dead ends: 3548 [2022-11-18 20:55:01,481 INFO L226 Difference]: Without dead ends: 3172 [2022-11-18 20:55:01,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=887, Invalid=2193, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 20:55:01,484 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 20375 mSDsluCounter, 3140 mSDsCounter, 0 mSdLazyCounter, 7649 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20375 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 7698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 7649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:01,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20375 Valid, 3336 Invalid, 7698 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [49 Valid, 7649 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-11-18 20:55:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2022-11-18 20:55:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 1188. [2022-11-18 20:55:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.6562763268744736) internal successors, (1966), 1187 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1966 transitions. [2022-11-18 20:55:01,527 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1966 transitions. Word has length 349 [2022-11-18 20:55:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:01,529 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1966 transitions. [2022-11-18 20:55:01,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 43.375) internal successors, (1041), 24 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:01,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1966 transitions. [2022-11-18 20:55:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-11-18 20:55:01,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:01,539 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:01,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:01,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-18 20:55:01,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:01,753 INFO L85 PathProgramCache]: Analyzing trace with hash -643937131, now seen corresponding path program 1 times [2022-11-18 20:55:01,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:01,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075957963] [2022-11-18 20:55:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:01,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:12,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:12,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075957963] [2022-11-18 20:55:12,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075957963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:12,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465325512] [2022-11-18 20:55:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:12,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:12,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:12,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:12,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:55:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:13,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 2805 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-18 20:55:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:16,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-18 20:55:18,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465325512] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:18,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:18,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 10] total 19 [2022-11-18 20:55:18,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626527218] [2022-11-18 20:55:18,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:18,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:55:18,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:18,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:55:18,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:55:18,998 INFO L87 Difference]: Start difference. First operand 1188 states and 1966 transitions. Second operand has 6 states, 6 states have (on average 43.333333333333336) internal successors, (260), 6 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:21,959 INFO L93 Difference]: Finished difference Result 2938 states and 4859 transitions. [2022-11-18 20:55:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:55:21,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 43.333333333333336) internal successors, (260), 6 states have internal predecessors, (260), 0 states have call successors, (0), 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 350 [2022-11-18 20:55:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:21,970 INFO L225 Difference]: With dead ends: 2938 [2022-11-18 20:55:21,970 INFO L226 Difference]: Without dead ends: 2936 [2022-11-18 20:55:21,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 692 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:55:21,972 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 4895 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4895 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:21,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4895 Valid, 1618 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-18 20:55:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2022-11-18 20:55:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 1191. [2022-11-18 20:55:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.6563025210084035) internal successors, (1971), 1190 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1971 transitions. [2022-11-18 20:55:22,009 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1971 transitions. Word has length 350 [2022-11-18 20:55:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:22,010 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 1971 transitions. [2022-11-18 20:55:22,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.333333333333336) internal successors, (260), 6 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1971 transitions. [2022-11-18 20:55:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-11-18 20:55:22,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:22,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:22,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:55:22,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:22,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:22,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash -643877549, now seen corresponding path program 1 times [2022-11-18 20:55:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:22,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828307413] [2022-11-18 20:55:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:22,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:30,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:30,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828307413] [2022-11-18 20:55:30,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828307413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:30,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592574851] [2022-11-18 20:55:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:30,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:30,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:30,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:30,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:55:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:31,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 2805 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 20:55:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:33,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-18 20:55:34,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592574851] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:34,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:34,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 9] total 14 [2022-11-18 20:55:34,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513266680] [2022-11-18 20:55:34,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:34,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:55:34,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:55:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:55:34,199 INFO L87 Difference]: Start difference. First operand 1191 states and 1971 transitions. Second operand has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:34,513 INFO L93 Difference]: Finished difference Result 2939 states and 4865 transitions. [2022-11-18 20:55:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:55:34,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 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 350 [2022-11-18 20:55:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:34,524 INFO L225 Difference]: With dead ends: 2939 [2022-11-18 20:55:34,525 INFO L226 Difference]: Without dead ends: 2560 [2022-11-18 20:55:34,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:55:34,527 INFO L413 NwaCegarLoop]: 849 mSDtfsCounter, 1832 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1832 SdHoareTripleChecker+Valid, 2303 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:34,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1832 Valid, 2303 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:55:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-11-18 20:55:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1188. [2022-11-18 20:55:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.6562763268744736) internal successors, (1966), 1187 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1966 transitions. [2022-11-18 20:55:34,564 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1966 transitions. Word has length 350 [2022-11-18 20:55:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:34,565 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1966 transitions. [2022-11-18 20:55:34,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1966 transitions. [2022-11-18 20:55:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-11-18 20:55:34,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:34,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:34,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:34,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:34,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:34,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1217606417, now seen corresponding path program 1 times [2022-11-18 20:55:34,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:34,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013277271] [2022-11-18 20:55:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:34,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:43,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013277271] [2022-11-18 20:55:43,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013277271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:43,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656017237] [2022-11-18 20:55:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:43,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:43,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:43,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:43,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:55:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:44,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 2808 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-18 20:55:44,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:47,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-18 20:55:49,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656017237] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:49,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:49,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 11] total 21 [2022-11-18 20:55:49,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541122998] [2022-11-18 20:55:49,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:49,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:55:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:49,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:55:49,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:55:49,554 INFO L87 Difference]: Start difference. First operand 1188 states and 1966 transitions. Second operand has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:53,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:53,284 INFO L93 Difference]: Finished difference Result 2961 states and 4894 transitions. [2022-11-18 20:55:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:55:53,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 0 states have call successors, (0), 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 351 [2022-11-18 20:55:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:53,294 INFO L225 Difference]: With dead ends: 2961 [2022-11-18 20:55:53,294 INFO L226 Difference]: Without dead ends: 2959 [2022-11-18 20:55:53,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:55:53,296 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 7361 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7361 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:53,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7361 Valid, 1442 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-18 20:55:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2022-11-18 20:55:53,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 1194. [2022-11-18 20:55:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 1.6563285834031853) internal successors, (1976), 1193 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1976 transitions. [2022-11-18 20:55:53,334 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1976 transitions. Word has length 351 [2022-11-18 20:55:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:53,334 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 1976 transitions. [2022-11-18 20:55:53,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1976 transitions. [2022-11-18 20:55:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-11-18 20:55:53,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:53,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:53,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:53,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:55:53,559 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:53,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:53,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1217546835, now seen corresponding path program 1 times [2022-11-18 20:55:53,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:53,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348171604] [2022-11-18 20:55:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:53,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:59,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:59,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348171604] [2022-11-18 20:55:59,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348171604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:59,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117688428] [2022-11-18 20:55:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:59,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:59,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:59,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:59,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:56:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:00,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 2808 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-18 20:56:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:02,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-18 20:56:04,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117688428] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:04,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:56:04,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 12] total 18 [2022-11-18 20:56:04,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806781296] [2022-11-18 20:56:04,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:04,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:56:04,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:04,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:56:04,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:56:04,927 INFO L87 Difference]: Start difference. First operand 1194 states and 1976 transitions. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:05,264 INFO L93 Difference]: Finished difference Result 2964 states and 4904 transitions. [2022-11-18 20:56:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:56:05,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 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 351 [2022-11-18 20:56:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:05,275 INFO L225 Difference]: With dead ends: 2964 [2022-11-18 20:56:05,275 INFO L226 Difference]: Without dead ends: 2580 [2022-11-18 20:56:05,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:56:05,280 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 2450 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2450 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:05,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2450 Valid, 3147 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:56:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2022-11-18 20:56:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 1188. [2022-11-18 20:56:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.6562763268744736) internal successors, (1966), 1187 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1966 transitions. [2022-11-18 20:56:05,317 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1966 transitions. Word has length 351 [2022-11-18 20:56:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:05,318 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1966 transitions. [2022-11-18 20:56:05,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1966 transitions. [2022-11-18 20:56:05,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-11-18 20:56:05,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:05,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:05,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:05,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:56:05,539 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:05,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash 798200765, now seen corresponding path program 1 times [2022-11-18 20:56:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:05,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390202812] [2022-11-18 20:56:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:05,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:13,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:13,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390202812] [2022-11-18 20:56:13,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390202812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:13,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553065223] [2022-11-18 20:56:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:13,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:13,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:13,585 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:13,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:56:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:14,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 2811 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-18 20:56:14,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:18,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 20:56:20,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553065223] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:20,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:56:20,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 12] total 23 [2022-11-18 20:56:20,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172962011] [2022-11-18 20:56:20,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:20,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:56:20,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:56:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:56:20,495 INFO L87 Difference]: Start difference. First operand 1188 states and 1966 transitions. Second operand has 8 states, 8 states have (on average 33.25) internal successors, (266), 8 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:25,057 INFO L93 Difference]: Finished difference Result 2996 states and 4951 transitions. [2022-11-18 20:56:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:56:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 33.25) internal successors, (266), 8 states have internal predecessors, (266), 0 states have call successors, (0), 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 352 [2022-11-18 20:56:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:25,068 INFO L225 Difference]: With dead ends: 2996 [2022-11-18 20:56:25,068 INFO L226 Difference]: Without dead ends: 2994 [2022-11-18 20:56:25,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 700 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:56:25,071 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 7388 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 3257 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7388 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 3262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:25,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7388 Valid, 2102 Invalid, 3262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3257 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-18 20:56:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2022-11-18 20:56:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 1197. [2022-11-18 20:56:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 1.6563545150501673) internal successors, (1981), 1196 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1981 transitions. [2022-11-18 20:56:25,108 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1981 transitions. Word has length 352 [2022-11-18 20:56:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:25,109 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1981 transitions. [2022-11-18 20:56:25,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.25) internal successors, (266), 8 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1981 transitions. [2022-11-18 20:56:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-11-18 20:56:25,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:25,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:25,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:25,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:25,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:25,335 INFO L85 PathProgramCache]: Analyzing trace with hash 798260347, now seen corresponding path program 1 times [2022-11-18 20:56:25,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:25,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404601854] [2022-11-18 20:56:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:25,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:33,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:33,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404601854] [2022-11-18 20:56:33,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404601854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:33,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836025840] [2022-11-18 20:56:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:33,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:33,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:33,686 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:33,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:56:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:34,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2811 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 20:56:34,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:37,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 20:56:39,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836025840] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:39,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:56:39,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 13] total 20 [2022-11-18 20:56:39,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638268644] [2022-11-18 20:56:39,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:39,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:56:39,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:39,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:56:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:56:39,150 INFO L87 Difference]: Start difference. First operand 1197 states and 1981 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:39,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:39,507 INFO L93 Difference]: Finished difference Result 2994 states and 4954 transitions. [2022-11-18 20:56:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:56:39,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 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 352 [2022-11-18 20:56:39,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:39,514 INFO L225 Difference]: With dead ends: 2994 [2022-11-18 20:56:39,514 INFO L226 Difference]: Without dead ends: 2604 [2022-11-18 20:56:39,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:56:39,516 INFO L413 NwaCegarLoop]: 845 mSDtfsCounter, 3077 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3077 SdHoareTripleChecker+Valid, 3989 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:39,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3077 Valid, 3989 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:56:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2022-11-18 20:56:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 1188. [2022-11-18 20:56:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.6562763268744736) internal successors, (1966), 1187 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1966 transitions. [2022-11-18 20:56:39,547 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1966 transitions. Word has length 352 [2022-11-18 20:56:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:39,548 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1966 transitions. [2022-11-18 20:56:39,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1966 transitions. [2022-11-18 20:56:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-11-18 20:56:39,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:39,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:39,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 20:56:39,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:39,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:39,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1224382647, now seen corresponding path program 1 times [2022-11-18 20:56:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:39,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921295638] [2022-11-18 20:56:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:39,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:47,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921295638] [2022-11-18 20:56:47,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921295638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563835300] [2022-11-18 20:56:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:47,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:47,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:47,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:47,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:56:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:49,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 2814 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 20:56:49,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:52,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-18 20:56:54,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563835300] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:54,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:56:54,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 13] total 25 [2022-11-18 20:56:54,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475914683] [2022-11-18 20:56:54,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:54,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:56:54,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:54,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:56:54,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:56:54,412 INFO L87 Difference]: Start difference. First operand 1188 states and 1966 transitions. Second operand has 9 states, 9 states have (on average 29.88888888888889) internal successors, (269), 9 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:59,327 INFO L93 Difference]: Finished difference Result 3035 states and 5016 transitions. [2022-11-18 20:56:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:56:59,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.88888888888889) internal successors, (269), 9 states have internal predecessors, (269), 0 states have call successors, (0), 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 353 [2022-11-18 20:56:59,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:59,336 INFO L225 Difference]: With dead ends: 3035 [2022-11-18 20:56:59,336 INFO L226 Difference]: Without dead ends: 3033 [2022-11-18 20:56:59,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:56:59,339 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 9896 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 3423 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9896 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:59,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9896 Valid, 1942 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3423 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-18 20:56:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2022-11-18 20:56:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 1200. [2022-11-18 20:56:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 1.6563803169307756) internal successors, (1986), 1199 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1986 transitions. [2022-11-18 20:56:59,370 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1986 transitions. Word has length 353 [2022-11-18 20:56:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:59,371 INFO L495 AbstractCegarLoop]: Abstraction has 1200 states and 1986 transitions. [2022-11-18 20:56:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.88888888888889) internal successors, (269), 9 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1986 transitions. [2022-11-18 20:56:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-11-18 20:56:59,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:59,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:59,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:59,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:56:59,591 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1224323065, now seen corresponding path program 1 times [2022-11-18 20:56:59,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:59,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37729803] [2022-11-18 20:56:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:10,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:10,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37729803] [2022-11-18 20:57:10,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37729803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:10,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692519939] [2022-11-18 20:57:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:10,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:10,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:10,965 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:10,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:57:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:12,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 2814 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-18 20:57:12,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:13,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-18 20:57:15,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692519939] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:15,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:57:15,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 12] total 19 [2022-11-18 20:57:15,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096704468] [2022-11-18 20:57:15,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:15,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:57:15,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:15,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:57:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:57:15,121 INFO L87 Difference]: Start difference. First operand 1200 states and 1986 transitions. Second operand has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:15,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:15,657 INFO L93 Difference]: Finished difference Result 3024 states and 5004 transitions. [2022-11-18 20:57:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:57:15,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 0 states have call successors, (0), 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 353 [2022-11-18 20:57:15,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:15,664 INFO L225 Difference]: With dead ends: 3024 [2022-11-18 20:57:15,664 INFO L226 Difference]: Without dead ends: 2628 [2022-11-18 20:57:15,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:57:15,667 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 3709 mSDsluCounter, 3986 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3709 SdHoareTripleChecker+Valid, 4829 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:15,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3709 Valid, 4829 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:57:15,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2022-11-18 20:57:15,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 1188. [2022-11-18 20:57:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.6562763268744736) internal successors, (1966), 1187 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1966 transitions. [2022-11-18 20:57:15,696 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1966 transitions. Word has length 353 [2022-11-18 20:57:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:15,696 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1966 transitions. [2022-11-18 20:57:15,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1966 transitions. [2022-11-18 20:57:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-11-18 20:57:15,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:15,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:15,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:15,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:57:15,920 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:15,921 INFO L85 PathProgramCache]: Analyzing trace with hash 238831203, now seen corresponding path program 1 times [2022-11-18 20:57:15,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:15,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59446370] [2022-11-18 20:57:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:15,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:22,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:22,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59446370] [2022-11-18 20:57:22,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59446370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:22,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802925280] [2022-11-18 20:57:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:22,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:22,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:22,824 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:22,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:57:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:23,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 2817 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-18 20:57:23,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:27,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-18 20:57:28,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802925280] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:28,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:57:28,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 14] total 27 [2022-11-18 20:57:28,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946908653] [2022-11-18 20:57:28,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:28,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:57:28,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:57:28,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:57:28,686 INFO L87 Difference]: Start difference. First operand 1188 states and 1966 transitions. Second operand has 10 states, 10 states have (on average 27.2) internal successors, (272), 10 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:34,270 INFO L93 Difference]: Finished difference Result 3074 states and 5081 transitions. [2022-11-18 20:57:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 20:57:34,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.2) internal successors, (272), 10 states have internal predecessors, (272), 0 states have call successors, (0), 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 354 [2022-11-18 20:57:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:34,277 INFO L225 Difference]: With dead ends: 3074 [2022-11-18 20:57:34,277 INFO L226 Difference]: Without dead ends: 3072 [2022-11-18 20:57:34,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 710 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:57:34,279 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 9913 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 4483 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9913 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 4488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:34,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9913 Valid, 2586 Invalid, 4488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4483 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-18 20:57:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-11-18 20:57:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 1203. [2022-11-18 20:57:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.656405990016639) internal successors, (1991), 1202 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1991 transitions. [2022-11-18 20:57:34,313 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1991 transitions. Word has length 354 [2022-11-18 20:57:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:34,314 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1991 transitions. [2022-11-18 20:57:34,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.2) internal successors, (272), 10 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1991 transitions. [2022-11-18 20:57:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-11-18 20:57:34,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:34,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:34,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:34,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:57:34,535 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:34,536 INFO L85 PathProgramCache]: Analyzing trace with hash 238890785, now seen corresponding path program 1 times [2022-11-18 20:57:34,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:34,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510153947] [2022-11-18 20:57:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:34,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:41,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:41,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510153947] [2022-11-18 20:57:41,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510153947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:41,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039734424] [2022-11-18 20:57:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:41,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:41,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:41,635 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:41,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:57:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 2817 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-18 20:57:42,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:45,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-18 20:57:46,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039734424] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:46,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:57:46,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 15] total 24 [2022-11-18 20:57:46,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628913590] [2022-11-18 20:57:46,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:46,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:57:46,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:57:46,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:57:46,602 INFO L87 Difference]: Start difference. First operand 1203 states and 1991 transitions. Second operand has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:47,223 INFO L93 Difference]: Finished difference Result 3054 states and 5054 transitions. [2022-11-18 20:57:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:57:47,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 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 354 [2022-11-18 20:57:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:47,230 INFO L225 Difference]: With dead ends: 3054 [2022-11-18 20:57:47,230 INFO L226 Difference]: Without dead ends: 2652 [2022-11-18 20:57:47,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:57:47,233 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 4346 mSDsluCounter, 4826 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4346 SdHoareTripleChecker+Valid, 5667 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:47,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4346 Valid, 5667 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:57:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2022-11-18 20:57:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1188. [2022-11-18 20:57:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.6562763268744736) internal successors, (1966), 1187 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1966 transitions. [2022-11-18 20:57:47,262 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1966 transitions. Word has length 354 [2022-11-18 20:57:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:47,263 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1966 transitions. [2022-11-18 20:57:47,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1966 transitions. [2022-11-18 20:57:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-11-18 20:57:47,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:47,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:47,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:47,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:47,483 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:47,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1738896165, now seen corresponding path program 1 times [2022-11-18 20:57:47,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:47,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529661770] [2022-11-18 20:57:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:47,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:51,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:51,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529661770] [2022-11-18 20:57:51,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529661770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:51,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719911106] [2022-11-18 20:57:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:51,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:51,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:51,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:57:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 2820 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-18 20:57:52,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:56,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 20:57:58,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719911106] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:58,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:57:58,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 15] total 29 [2022-11-18 20:57:58,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972304090] [2022-11-18 20:57:58,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:58,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:57:58,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:58,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:57:58,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:57:58,113 INFO L87 Difference]: Start difference. First operand 1188 states and 1966 transitions. Second operand has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:04,395 INFO L93 Difference]: Finished difference Result 3113 states and 5146 transitions. [2022-11-18 20:58:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 20:58:04,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 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 355 [2022-11-18 20:58:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:04,401 INFO L225 Difference]: With dead ends: 3113 [2022-11-18 20:58:04,402 INFO L226 Difference]: Without dead ends: 3111 [2022-11-18 20:58:04,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=498, Invalid=3042, Unknown=0, NotChecked=0, Total=3540 [2022-11-18 20:58:04,404 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 11183 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 5099 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11183 SdHoareTripleChecker+Valid, 2825 SdHoareTripleChecker+Invalid, 5104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:04,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11183 Valid, 2825 Invalid, 5104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 5099 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-18 20:58:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-18 20:58:04,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 1206. [2022-11-18 20:58:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 1.6564315352697097) internal successors, (1996), 1205 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1996 transitions. [2022-11-18 20:58:04,436 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1996 transitions. Word has length 355 [2022-11-18 20:58:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:04,436 INFO L495 AbstractCegarLoop]: Abstraction has 1206 states and 1996 transitions. [2022-11-18 20:58:04,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1996 transitions. [2022-11-18 20:58:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-11-18 20:58:04,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:04,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:04,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 20:58:04,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:58:04,655 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:04,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1738955747, now seen corresponding path program 1 times [2022-11-18 20:58:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:04,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014338032] [2022-11-18 20:58:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:04,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:16,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:16,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014338032] [2022-11-18 20:58:16,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014338032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:16,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275078998] [2022-11-18 20:58:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:16,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:16,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:16,168 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:16,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:58:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:17,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 2820 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-18 20:58:17,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:19,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 20:58:21,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275078998] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:21,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:21,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 14] total 23 [2022-11-18 20:58:21,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495680918] [2022-11-18 20:58:21,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:21,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:58:21,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:21,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:58:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:58:21,040 INFO L87 Difference]: Start difference. First operand 1206 states and 1996 transitions. Second operand has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:21,728 INFO L93 Difference]: Finished difference Result 3084 states and 5104 transitions. [2022-11-18 20:58:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:58:21,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 0 states have call successors, (0), 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 355 [2022-11-18 20:58:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:21,738 INFO L225 Difference]: With dead ends: 3084 [2022-11-18 20:58:21,739 INFO L226 Difference]: Without dead ends: 2676 [2022-11-18 20:58:21,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 709 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:58:21,745 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 4988 mSDsluCounter, 5664 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4988 SdHoareTripleChecker+Valid, 6503 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:21,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4988 Valid, 6503 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:58:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2022-11-18 20:58:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1188. [2022-11-18 20:58:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.6562763268744736) internal successors, (1966), 1187 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1966 transitions. [2022-11-18 20:58:21,774 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1966 transitions. Word has length 355 [2022-11-18 20:58:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:21,774 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1966 transitions. [2022-11-18 20:58:21,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1966 transitions. [2022-11-18 20:58:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-11-18 20:58:21,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:21,779 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:21,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:21,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:58:21,994 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:21,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:21,995 INFO L85 PathProgramCache]: Analyzing trace with hash 558136971, now seen corresponding path program 1 times [2022-11-18 20:58:21,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:21,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386607819] [2022-11-18 20:58:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:21,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:29,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:29,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386607819] [2022-11-18 20:58:29,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386607819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:29,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123565016] [2022-11-18 20:58:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:29,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:29,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:29,485 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:29,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:58:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:30,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 2823 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-18 20:58:30,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:34,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 20:58:36,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123565016] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:36,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:36,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 16] total 31 [2022-11-18 20:58:36,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760090500] [2022-11-18 20:58:36,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:36,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:58:36,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:36,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:58:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:58:36,214 INFO L87 Difference]: Start difference. First operand 1188 states and 1966 transitions. Second operand has 12 states, 12 states have (on average 23.166666666666668) internal successors, (278), 12 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:43,368 INFO L93 Difference]: Finished difference Result 3152 states and 5211 transitions. [2022-11-18 20:58:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 20:58:43,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 23.166666666666668) internal successors, (278), 12 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2022-11-18 20:58:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:43,376 INFO L225 Difference]: With dead ends: 3152 [2022-11-18 20:58:43,376 INFO L226 Difference]: Without dead ends: 3150 [2022-11-18 20:58:43,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=620, Invalid=3802, Unknown=0, NotChecked=0, Total=4422 [2022-11-18 20:58:43,380 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 13736 mSDsluCounter, 2292 mSDsCounter, 0 mSdLazyCounter, 5253 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13736 SdHoareTripleChecker+Valid, 2677 SdHoareTripleChecker+Invalid, 5260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 5253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:43,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13736 Valid, 2677 Invalid, 5260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 5253 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-18 20:58:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2022-11-18 20:58:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 1209. [2022-11-18 20:58:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 1.656456953642384) internal successors, (2001), 1208 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2001 transitions. [2022-11-18 20:58:43,416 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2001 transitions. Word has length 356 [2022-11-18 20:58:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:43,417 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 2001 transitions. [2022-11-18 20:58:43,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.166666666666668) internal successors, (278), 12 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2001 transitions. [2022-11-18 20:58:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-11-18 20:58:43,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:43,422 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:43,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:43,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:58:43,640 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:43,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:43,640 INFO L85 PathProgramCache]: Analyzing trace with hash 558196553, now seen corresponding path program 1 times [2022-11-18 20:58:43,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:43,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674837039] [2022-11-18 20:58:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:43,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:51,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:51,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674837039] [2022-11-18 20:58:51,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674837039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:51,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947186127] [2022-11-18 20:58:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:51,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:51,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:51,196 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:51,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:58:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:52,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 2823 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 20:58:52,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:54,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 20:58:56,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947186127] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:56,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:56,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 15] total 26 [2022-11-18 20:58:56,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766182921] [2022-11-18 20:58:56,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:56,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:58:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:56,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:58:56,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:58:56,066 INFO L87 Difference]: Start difference. First operand 1209 states and 2001 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:56,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:56,926 INFO L93 Difference]: Finished difference Result 3114 states and 5154 transitions. [2022-11-18 20:58:56,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:58:56,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2022-11-18 20:58:56,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:56,930 INFO L225 Difference]: With dead ends: 3114 [2022-11-18 20:58:56,930 INFO L226 Difference]: Without dead ends: 2700 [2022-11-18 20:58:56,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:58:56,932 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 5635 mSDsluCounter, 6500 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5635 SdHoareTripleChecker+Valid, 7337 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:56,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5635 Valid, 7337 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:58:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2022-11-18 20:58:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 1188. [2022-11-18 20:58:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.6562763268744736) internal successors, (1966), 1187 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1966 transitions. [2022-11-18 20:58:56,958 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1966 transitions. Word has length 356 [2022-11-18 20:58:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:56,958 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1966 transitions. [2022-11-18 20:58:56,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1966 transitions. [2022-11-18 20:58:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-11-18 20:58:56,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:56,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:56,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:57,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:58:57,178 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:57,178 INFO L85 PathProgramCache]: Analyzing trace with hash 796428671, now seen corresponding path program 1 times [2022-11-18 20:58:57,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:57,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266827725] [2022-11-18 20:58:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:57,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:04,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:04,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266827725] [2022-11-18 20:59:04,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266827725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:04,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481516450] [2022-11-18 20:59:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:04,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:04,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:04,534 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:04,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:59:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:05,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 2826 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-18 20:59:05,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:09,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 20:59:11,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481516450] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:11,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:11,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 17] total 33 [2022-11-18 20:59:11,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36879275] [2022-11-18 20:59:11,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:59:11,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:59:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:59:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:59:11,991 INFO L87 Difference]: Start difference. First operand 1188 states and 1966 transitions. Second operand has 13 states, 13 states have (on average 21.615384615384617) internal successors, (281), 13 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:20,374 INFO L93 Difference]: Finished difference Result 3191 states and 5276 transitions. [2022-11-18 20:59:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 20:59:20,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.615384615384617) internal successors, (281), 13 states have internal predecessors, (281), 0 states have call successors, (0), 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 357 [2022-11-18 20:59:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:20,381 INFO L225 Difference]: With dead ends: 3191 [2022-11-18 20:59:20,381 INFO L226 Difference]: Without dead ends: 3189 [2022-11-18 20:59:20,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=756, Invalid=4646, Unknown=0, NotChecked=0, Total=5402 [2022-11-18 20:59:20,385 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 15026 mSDsluCounter, 2539 mSDsCounter, 0 mSdLazyCounter, 5867 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15026 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 5874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 5867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:20,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15026 Valid, 2918 Invalid, 5874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 5867 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-18 20:59:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2022-11-18 20:59:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 1212. [2022-11-18 20:59:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.6564822460776218) internal successors, (2006), 1211 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2006 transitions. [2022-11-18 20:59:20,418 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2006 transitions. Word has length 357 [2022-11-18 20:59:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:20,418 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 2006 transitions. [2022-11-18 20:59:20,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.615384615384617) internal successors, (281), 13 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2006 transitions. [2022-11-18 20:59:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-11-18 20:59:20,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:20,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:20,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:20,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:59:20,643 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:20,643 INFO L85 PathProgramCache]: Analyzing trace with hash 796488253, now seen corresponding path program 1 times [2022-11-18 20:59:20,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:20,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96706142] [2022-11-18 20:59:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:20,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:25,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96706142] [2022-11-18 20:59:25,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96706142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:25,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290593073] [2022-11-18 20:59:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:25,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:25,263 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:25,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:59:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:26,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 2826 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-18 20:59:26,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:29,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 20:59:31,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290593073] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:31,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:31,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 18] total 30 [2022-11-18 20:59:31,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883874711] [2022-11-18 20:59:31,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:59:31,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:59:31,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:31,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:59:31,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:59:31,038 INFO L87 Difference]: Start difference. First operand 1212 states and 2006 transitions. Second operand has 11 states, 11 states have (on average 25.545454545454547) internal successors, (281), 11 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:32,124 INFO L93 Difference]: Finished difference Result 3144 states and 5204 transitions. [2022-11-18 20:59:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:59:32,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 25.545454545454547) internal successors, (281), 11 states have internal predecessors, (281), 0 states have call successors, (0), 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 357 [2022-11-18 20:59:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:32,127 INFO L225 Difference]: With dead ends: 3144 [2022-11-18 20:59:32,127 INFO L226 Difference]: Without dead ends: 2724 [2022-11-18 20:59:32,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 712 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=344, Invalid=2308, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 20:59:32,129 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 6287 mSDsluCounter, 7334 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6287 SdHoareTripleChecker+Valid, 8169 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:32,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6287 Valid, 8169 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:59:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2022-11-18 20:59:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1188. [2022-11-18 20:59:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.6562763268744736) internal successors, (1966), 1187 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1966 transitions. [2022-11-18 20:59:32,153 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1966 transitions. Word has length 357 [2022-11-18 20:59:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:32,154 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1966 transitions. [2022-11-18 20:59:32,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.545454545454547) internal successors, (281), 11 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1966 transitions. [2022-11-18 20:59:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-11-18 20:59:32,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:32,158 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:32,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-18 20:59:32,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:32,375 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1330484529, now seen corresponding path program 1 times [2022-11-18 20:59:32,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:32,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039287360] [2022-11-18 20:59:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:32,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:39,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039287360] [2022-11-18 20:59:39,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039287360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530289335] [2022-11-18 20:59:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:39,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:39,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:39,523 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:39,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:59:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:40,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2829 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-18 20:59:40,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:45,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 20:59:47,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530289335] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:47,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:47,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 18] total 35 [2022-11-18 20:59:47,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702628219] [2022-11-18 20:59:47,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:59:47,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:59:47,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:47,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:59:47,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:59:47,914 INFO L87 Difference]: Start difference. First operand 1188 states and 1966 transitions. Second operand has 14 states, 14 states have (on average 20.285714285714285) internal successors, (284), 14 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:57,684 INFO L93 Difference]: Finished difference Result 3230 states and 5341 transitions. [2022-11-18 20:59:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-18 20:59:57,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.285714285714285) internal successors, (284), 14 states have internal predecessors, (284), 0 states have call successors, (0), 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 358 [2022-11-18 20:59:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:57,688 INFO L225 Difference]: With dead ends: 3230 [2022-11-18 20:59:57,688 INFO L226 Difference]: Without dead ends: 3228 [2022-11-18 20:59:57,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=906, Invalid=5574, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:59:57,692 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 15023 mSDsluCounter, 3157 mSDsCounter, 0 mSdLazyCounter, 6959 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15023 SdHoareTripleChecker+Valid, 3530 SdHoareTripleChecker+Invalid, 6964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:57,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15023 Valid, 3530 Invalid, 6964 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 6959 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-18 20:59:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2022-11-18 20:59:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 1215. [2022-11-18 20:59:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 1.656507413509061) internal successors, (2011), 1214 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2011 transitions. [2022-11-18 20:59:57,720 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2011 transitions. Word has length 358 [2022-11-18 20:59:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:57,721 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 2011 transitions. [2022-11-18 20:59:57,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.285714285714285) internal successors, (284), 14 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2011 transitions. [2022-11-18 20:59:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-11-18 20:59:57,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:57,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:57,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:57,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:57,939 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1330544111, now seen corresponding path program 1 times [2022-11-18 20:59:57,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:57,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195381053] [2022-11-18 20:59:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:57,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:00:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:04,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:00:04,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195381053] [2022-11-18 21:00:04,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195381053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:04,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939841439] [2022-11-18 21:00:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:04,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:04,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:00:04,485 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:00:04,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 21:00:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 2829 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-18 21:00:06,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:08,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 21:00:10,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939841439] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:10,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:10,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 17] total 30 [2022-11-18 21:00:10,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426930150] [2022-11-18 21:00:10,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:00:10,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:00:10,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:00:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:00:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2022-11-18 21:00:10,129 INFO L87 Difference]: Start difference. First operand 1215 states and 2011 transitions. Second operand has 12 states, 12 states have (on average 23.666666666666668) internal successors, (284), 12 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:11,534 INFO L93 Difference]: Finished difference Result 3174 states and 5254 transitions. [2022-11-18 21:00:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 21:00:11,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 23.666666666666668) internal successors, (284), 12 states have internal predecessors, (284), 0 states have call successors, (0), 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 358 [2022-11-18 21:00:11,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:11,538 INFO L225 Difference]: With dead ends: 3174 [2022-11-18 21:00:11,538 INFO L226 Difference]: Without dead ends: 2748 [2022-11-18 21:00:11,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=2566, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 21:00:11,540 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 6944 mSDsluCounter, 8166 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6944 SdHoareTripleChecker+Valid, 8999 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:11,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6944 Valid, 8999 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:00:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2022-11-18 21:00:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 1188. [2022-11-18 21:00:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.6562763268744736) internal successors, (1966), 1187 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1966 transitions. [2022-11-18 21:00:11,564 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1966 transitions. Word has length 358 [2022-11-18 21:00:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:11,565 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1966 transitions. [2022-11-18 21:00:11,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.666666666666668) internal successors, (284), 12 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1966 transitions. [2022-11-18 21:00:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-18 21:00:11,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:11,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:11,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:11,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:11,788 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:00:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1052384859, now seen corresponding path program 1 times [2022-11-18 21:00:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:00:11,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529788957] [2022-11-18 21:00:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:11,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:00:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:19,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:00:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529788957] [2022-11-18 21:00:19,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529788957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745330480] [2022-11-18 21:00:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:19,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:19,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:00:19,174 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:00:19,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 21:00:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:20,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 2832 conjuncts, 127 conjunts are in the unsatisfiable core [2022-11-18 21:00:20,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:25,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-18 21:00:28,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745330480] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:28,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:28,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 19] total 37 [2022-11-18 21:00:28,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297616072] [2022-11-18 21:00:28,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:00:28,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 21:00:28,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:00:28,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 21:00:28,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 21:00:28,142 INFO L87 Difference]: Start difference. First operand 1188 states and 1966 transitions. Second operand has 15 states, 15 states have (on average 19.133333333333333) internal successors, (287), 15 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:40,044 INFO L93 Difference]: Finished difference Result 3269 states and 5406 transitions. [2022-11-18 21:00:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-18 21:00:40,045 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 19.133333333333333) internal successors, (287), 15 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-18 21:00:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:40,050 INFO L225 Difference]: With dead ends: 3269 [2022-11-18 21:00:40,050 INFO L226 Difference]: Without dead ends: 3267 [2022-11-18 21:00:40,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1070, Invalid=6586, Unknown=0, NotChecked=0, Total=7656 [2022-11-18 21:00:40,054 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 16313 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 7583 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16313 SdHoareTripleChecker+Valid, 3761 SdHoareTripleChecker+Invalid, 7588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:40,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16313 Valid, 3761 Invalid, 7588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 7583 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-18 21:00:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2022-11-18 21:00:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1218. [2022-11-18 21:00:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.656532456861134) internal successors, (2016), 1217 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2016 transitions. [2022-11-18 21:00:40,076 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2016 transitions. Word has length 359 [2022-11-18 21:00:40,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:40,077 INFO L495 AbstractCegarLoop]: Abstraction has 1218 states and 2016 transitions. [2022-11-18 21:00:40,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.133333333333333) internal successors, (287), 15 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2016 transitions. [2022-11-18 21:00:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-18 21:00:40,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:40,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:40,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:40,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:40,296 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:00:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:40,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1052444441, now seen corresponding path program 1 times [2022-11-18 21:00:40,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:00:40,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86703666] [2022-11-18 21:00:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:40,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:00:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:45,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:00:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86703666] [2022-11-18 21:00:45,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86703666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:45,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16838057] [2022-11-18 21:00:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:45,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:45,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:00:45,279 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:00:45,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 21:00:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:46,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 2832 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-18 21:00:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:50,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-18 21:00:52,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16838057] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:52,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:52,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 19] total 36 [2022-11-18 21:00:52,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079208585] [2022-11-18 21:00:52,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:00:52,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:00:52,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:00:52,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:00:52,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 21:00:52,772 INFO L87 Difference]: Start difference. First operand 1218 states and 2016 transitions. Second operand has 14 states, 14 states have (on average 20.5) internal successors, (287), 14 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:03,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:03,584 INFO L93 Difference]: Finished difference Result 4091 states and 6772 transitions. [2022-11-18 21:01:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-18 21:01:03,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.5) internal successors, (287), 14 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-18 21:01:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:03,589 INFO L225 Difference]: With dead ends: 4091 [2022-11-18 21:01:03,589 INFO L226 Difference]: Without dead ends: 3659 [2022-11-18 21:01:03,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 734 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=929, Invalid=5877, Unknown=0, NotChecked=0, Total=6806 [2022-11-18 21:01:03,604 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 8937 mSDsluCounter, 6421 mSDsCounter, 0 mSdLazyCounter, 10604 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8937 SdHoareTripleChecker+Valid, 7005 SdHoareTripleChecker+Invalid, 10608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:03,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8937 Valid, 7005 Invalid, 10608 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 10604 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-18 21:01:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3659 states. [2022-11-18 21:01:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3659 to 1218. [2022-11-18 21:01:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.6557107641741988) internal successors, (2015), 1217 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2015 transitions. [2022-11-18 21:01:03,632 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2015 transitions. Word has length 359 [2022-11-18 21:01:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:03,633 INFO L495 AbstractCegarLoop]: Abstraction has 1218 states and 2015 transitions. [2022-11-18 21:01:03,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.5) internal successors, (287), 14 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2015 transitions. [2022-11-18 21:01:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-11-18 21:01:03,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:03,637 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:03,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:03,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 21:01:03,856 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:01:03,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:03,856 INFO L85 PathProgramCache]: Analyzing trace with hash -410468775, now seen corresponding path program 1 times [2022-11-18 21:01:03,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:03,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776561333] [2022-11-18 21:01:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:03,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:16,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:16,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776561333] [2022-11-18 21:01:16,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776561333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:01:16,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659347549] [2022-11-18 21:01:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:16,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:01:16,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:01:16,453 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:01:16,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 21:01:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:18,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 2835 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-18 21:01:18,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:22,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-18 21:01:25,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659347549] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:01:25,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:25,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7, 20] total 39 [2022-11-18 21:01:25,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503182047] [2022-11-18 21:01:25,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:25,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:01:25,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:01:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 21:01:25,399 INFO L87 Difference]: Start difference. First operand 1218 states and 2015 transitions. Second operand has 16 states, 16 states have (on average 18.125) internal successors, (290), 16 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:39,192 INFO L93 Difference]: Finished difference Result 3514 states and 5807 transitions. [2022-11-18 21:01:39,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 21:01:39,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.125) internal successors, (290), 16 states have internal predecessors, (290), 0 states have call successors, (0), 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 360 [2022-11-18 21:01:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:39,196 INFO L225 Difference]: With dead ends: 3514 [2022-11-18 21:01:39,196 INFO L226 Difference]: Without dead ends: 3512 [2022-11-18 21:01:39,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 740 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1244, Invalid=7686, Unknown=0, NotChecked=0, Total=8930 [2022-11-18 21:01:39,199 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 17608 mSDsluCounter, 3629 mSDsCounter, 0 mSdLazyCounter, 8209 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17608 SdHoareTripleChecker+Valid, 3990 SdHoareTripleChecker+Invalid, 8214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:39,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17608 Valid, 3990 Invalid, 8214 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 8209 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-18 21:01:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3512 states. [2022-11-18 21:01:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3512 to 1251. [2022-11-18 21:01:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 1.656) internal successors, (2070), 1250 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2070 transitions. [2022-11-18 21:01:39,234 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2070 transitions. Word has length 360 [2022-11-18 21:01:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:39,234 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 2070 transitions. [2022-11-18 21:01:39,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.125) internal successors, (290), 16 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2070 transitions. [2022-11-18 21:01:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-11-18 21:01:39,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:39,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:39,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:39,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 21:01:39,457 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:01:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash -410409193, now seen corresponding path program 1 times [2022-11-18 21:01:39,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:39,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728268987] [2022-11-18 21:01:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:39,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:47,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:47,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728268987] [2022-11-18 21:01:47,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728268987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:01:47,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625277316] [2022-11-18 21:01:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:47,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:01:47,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:01:47,526 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:01:47,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 21:01:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:49,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 2835 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-18 21:01:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:51,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-18 21:01:54,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625277316] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:01:54,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:54,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 19] total 34 [2022-11-18 21:01:54,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331337888] [2022-11-18 21:01:54,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:54,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:01:54,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:54,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:01:54,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 21:01:54,305 INFO L87 Difference]: Start difference. First operand 1251 states and 2070 transitions. Second operand has 14 states, 14 states have (on average 20.714285714285715) internal successors, (290), 14 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:56,289 INFO L93 Difference]: Finished difference Result 3428 states and 5671 transitions. [2022-11-18 21:01:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 21:01:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.714285714285715) internal successors, (290), 14 states have internal predecessors, (290), 0 states have call successors, (0), 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 360 [2022-11-18 21:01:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:56,293 INFO L225 Difference]: With dead ends: 3428 [2022-11-18 21:01:56,293 INFO L226 Difference]: Without dead ends: 2963 [2022-11-18 21:01:56,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=565, Invalid=3595, Unknown=0, NotChecked=0, Total=4160 [2022-11-18 21:01:56,295 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 8273 mSDsluCounter, 9824 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8273 SdHoareTripleChecker+Valid, 10653 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:56,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8273 Valid, 10653 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:01:56,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2022-11-18 21:01:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 1218. [2022-11-18 21:01:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.6557107641741988) internal successors, (2015), 1217 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2015 transitions. [2022-11-18 21:01:56,330 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2015 transitions. Word has length 360 [2022-11-18 21:01:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:56,330 INFO L495 AbstractCegarLoop]: Abstraction has 1218 states and 2015 transitions. [2022-11-18 21:01:56,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.714285714285715) internal successors, (290), 14 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2015 transitions. [2022-11-18 21:01:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-11-18 21:01:56,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:56,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:56,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:56,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 21:01:56,550 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:01:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2061750091, now seen corresponding path program 1 times [2022-11-18 21:01:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:56,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603189504] [2022-11-18 21:01:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:04,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:04,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603189504] [2022-11-18 21:02:04,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603189504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:04,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250324241] [2022-11-18 21:02:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:04,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:04,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:04,146 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:04,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 21:02:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:05,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 2838 conjuncts, 139 conjunts are in the unsatisfiable core [2022-11-18 21:02:05,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:10,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 21:02:13,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250324241] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:13,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:02:13,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [7, 21] total 41 [2022-11-18 21:02:13,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44035038] [2022-11-18 21:02:13,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:13,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 21:02:13,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 21:02:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 21:02:13,658 INFO L87 Difference]: Start difference. First operand 1218 states and 2015 transitions. Second operand has 17 states, 17 states have (on average 17.235294117647058) internal successors, (293), 17 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:02:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:28,235 INFO L93 Difference]: Finished difference Result 3565 states and 5892 transitions. [2022-11-18 21:02:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-18 21:02:28,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 17.235294117647058) internal successors, (293), 17 states have internal predecessors, (293), 0 states have call successors, (0), 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 361 [2022-11-18 21:02:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:28,239 INFO L225 Difference]: With dead ends: 3565 [2022-11-18 21:02:28,239 INFO L226 Difference]: Without dead ends: 3563 [2022-11-18 21:02:28,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2854 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1436, Invalid=8866, Unknown=0, NotChecked=0, Total=10302 [2022-11-18 21:02:28,242 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 18908 mSDsluCounter, 3862 mSDsCounter, 0 mSdLazyCounter, 8837 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18908 SdHoareTripleChecker+Valid, 4217 SdHoareTripleChecker+Invalid, 8842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:28,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18908 Valid, 4217 Invalid, 8842 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 8837 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-18 21:02:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2022-11-18 21:02:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 1254. [2022-11-18 21:02:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.656025538707103) internal successors, (2075), 1253 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:02:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 2075 transitions. [2022-11-18 21:02:28,313 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 2075 transitions. Word has length 361 [2022-11-18 21:02:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:28,314 INFO L495 AbstractCegarLoop]: Abstraction has 1254 states and 2075 transitions. [2022-11-18 21:02:28,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 17.235294117647058) internal successors, (293), 17 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:02:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 2075 transitions. [2022-11-18 21:02:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-11-18 21:02:28,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:28,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:28,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:28,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 21:02:28,539 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2061690509, now seen corresponding path program 1 times [2022-11-18 21:02:28,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:28,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88398040] [2022-11-18 21:02:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:28,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:33,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:33,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88398040] [2022-11-18 21:02:33,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88398040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:33,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141512237] [2022-11-18 21:02:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:33,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:33,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:33,881 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:33,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 21:02:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:35,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 2838 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-18 21:02:35,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:37,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 21:02:40,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141512237] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:40,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:02:40,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 20] total 36 [2022-11-18 21:02:40,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206059289] [2022-11-18 21:02:40,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:40,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 21:02:40,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 21:02:40,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 21:02:40,210 INFO L87 Difference]: Start difference. First operand 1254 states and 2075 transitions. Second operand has 15 states, 15 states have (on average 19.533333333333335) internal successors, (293), 15 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:02:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:42,595 INFO L93 Difference]: Finished difference Result 3461 states and 5726 transitions. [2022-11-18 21:02:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 21:02:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 19.533333333333335) internal successors, (293), 15 states have internal predecessors, (293), 0 states have call successors, (0), 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 361 [2022-11-18 21:02:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:42,598 INFO L225 Difference]: With dead ends: 3461 [2022-11-18 21:02:42,598 INFO L226 Difference]: Without dead ends: 2987 [2022-11-18 21:02:42,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=656, Invalid=4174, Unknown=0, NotChecked=0, Total=4830 [2022-11-18 21:02:42,601 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 8945 mSDsluCounter, 10650 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8945 SdHoareTripleChecker+Valid, 11477 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:42,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8945 Valid, 11477 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 21:02:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2022-11-18 21:02:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 1218. [2022-11-18 21:02:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.6557107641741988) internal successors, (2015), 1217 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:02:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2015 transitions. [2022-11-18 21:02:42,627 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2015 transitions. Word has length 361 [2022-11-18 21:02:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:42,627 INFO L495 AbstractCegarLoop]: Abstraction has 1218 states and 2015 transitions. [2022-11-18 21:02:42,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.533333333333335) internal successors, (293), 15 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:02:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2015 transitions. [2022-11-18 21:02:42,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-11-18 21:02:42,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:42,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:42,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:42,847 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2095204097, now seen corresponding path program 1 times [2022-11-18 21:02:42,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:42,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448207165] [2022-11-18 21:02:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:42,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:50,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:50,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448207165] [2022-11-18 21:02:50,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448207165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:50,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124493594] [2022-11-18 21:02:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:50,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:50,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:50,074 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:50,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 21:02:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 2841 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 21:02:51,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:57,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:02,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124493594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:02,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:02,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 12] total 26 [2022-11-18 21:03:02,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233405230] [2022-11-18 21:03:02,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:02,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 21:03:02,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 21:03:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-11-18 21:03:02,468 INFO L87 Difference]: Start difference. First operand 1218 states and 2015 transitions. Second operand has 26 states, 26 states have (on average 41.53846153846154) internal successors, (1080), 26 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:33,065 INFO L93 Difference]: Finished difference Result 18040 states and 29750 transitions. [2022-11-18 21:03:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-18 21:03:33,067 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 41.53846153846154) internal successors, (1080), 26 states have internal predecessors, (1080), 0 states have call successors, (0), 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 362 [2022-11-18 21:03:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:33,087 INFO L225 Difference]: With dead ends: 18040 [2022-11-18 21:03:33,087 INFO L226 Difference]: Without dead ends: 17599 [2022-11-18 21:03:33,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8259 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4426, Invalid=17036, Unknown=0, NotChecked=0, Total=21462 [2022-11-18 21:03:33,094 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 41071 mSDsluCounter, 4127 mSDsCounter, 0 mSdLazyCounter, 19080 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41071 SdHoareTripleChecker+Valid, 4469 SdHoareTripleChecker+Invalid, 19173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 19080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:33,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41071 Valid, 4469 Invalid, 19173 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [93 Valid, 19080 Invalid, 0 Unknown, 0 Unchecked, 22.5s Time] [2022-11-18 21:03:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17599 states. [2022-11-18 21:03:33,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17599 to 1440. [2022-11-18 21:03:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 1.6553161917998611) internal successors, (2382), 1439 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2382 transitions. [2022-11-18 21:03:33,210 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2382 transitions. Word has length 362 [2022-11-18 21:03:33,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:33,211 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 2382 transitions. [2022-11-18 21:03:33,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 41.53846153846154) internal successors, (1080), 26 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2382 transitions. [2022-11-18 21:03:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-11-18 21:03:33,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:33,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:33,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:33,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 21:03:33,437 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:03:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:33,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1663631693, now seen corresponding path program 1 times [2022-11-18 21:03:33,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:33,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877867849] [2022-11-18 21:03:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:33,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:35,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:35,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877867849] [2022-11-18 21:03:35,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877867849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:03:35,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:03:35,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 21:03:35,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644956967] [2022-11-18 21:03:35,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:35,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:03:35,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:03:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:03:35,967 INFO L87 Difference]: Start difference. First operand 1440 states and 2382 transitions. Second operand has 6 states, 6 states have (on average 60.5) internal successors, (363), 6 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:37,682 INFO L93 Difference]: Finished difference Result 8000 states and 13220 transitions. [2022-11-18 21:03:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:03:37,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 60.5) internal successors, (363), 6 states have internal predecessors, (363), 0 states have call successors, (0), 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 363 [2022-11-18 21:03:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:37,688 INFO L225 Difference]: With dead ends: 8000 [2022-11-18 21:03:37,688 INFO L226 Difference]: Without dead ends: 6623 [2022-11-18 21:03:37,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-18 21:03:37,698 INFO L413 NwaCegarLoop]: 2201 mSDtfsCounter, 2302 mSDsluCounter, 4378 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 6579 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:37,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 6579 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 21:03:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6623 states. [2022-11-18 21:03:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6623 to 2607. [2022-11-18 21:03:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 1.6542594013814276) internal successors, (4311), 2606 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 4311 transitions. [2022-11-18 21:03:37,769 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 4311 transitions. Word has length 363 [2022-11-18 21:03:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:37,769 INFO L495 AbstractCegarLoop]: Abstraction has 2607 states and 4311 transitions. [2022-11-18 21:03:37,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.5) internal successors, (363), 6 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 4311 transitions. [2022-11-18 21:03:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-11-18 21:03:37,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:37,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:37,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-18 21:03:37,775 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:03:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash 16010063, now seen corresponding path program 1 times [2022-11-18 21:03:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:37,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025397534] [2022-11-18 21:03:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:37,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:50,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:50,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025397534] [2022-11-18 21:03:50,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025397534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:50,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900650820] [2022-11-18 21:03:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:50,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:50,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:50,992 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:50,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 21:03:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:52,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-18 21:03:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:58,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:09,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900650820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:09,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:09,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 14] total 31 [2022-11-18 21:04:09,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487434742] [2022-11-18 21:04:09,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:09,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 21:04:09,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:09,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 21:04:09,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-11-18 21:04:09,002 INFO L87 Difference]: Start difference. First operand 2607 states and 4311 transitions. Second operand has 31 states, 31 states have (on average 34.935483870967744) internal successors, (1083), 31 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:52,953 INFO L93 Difference]: Finished difference Result 235143 states and 387300 transitions. [2022-11-18 21:06:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 943 states. [2022-11-18 21:06:52,954 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 34.935483870967744) internal successors, (1083), 31 states have internal predecessors, (1083), 0 states have call successors, (0), 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 363 [2022-11-18 21:06:52,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:53,218 INFO L225 Difference]: With dead ends: 235143 [2022-11-18 21:06:53,218 INFO L226 Difference]: Without dead ends: 232933 [2022-11-18 21:06:53,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1952 GetRequests, 986 SyntacticMatches, 0 SemanticMatches, 966 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463114 ImplicationChecksByTransitivity, 101.6s TimeCoverageRelationStatistics Valid=89096, Invalid=846960, Unknown=0, NotChecked=0, Total=936056 [2022-11-18 21:06:53,487 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 246472 mSDsluCounter, 5518 mSDsCounter, 0 mSdLazyCounter, 27442 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246472 SdHoareTripleChecker+Valid, 5855 SdHoareTripleChecker+Invalid, 27938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 27442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:53,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246472 Valid, 5855 Invalid, 27938 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [496 Valid, 27442 Invalid, 0 Unknown, 0 Unchecked, 44.3s Time] [2022-11-18 21:06:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232933 states. [2022-11-18 21:06:54,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232933 to 3445. [2022-11-18 21:06:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 1.653890824622532) internal successors, (5696), 3444 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 5696 transitions. [2022-11-18 21:06:55,000 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 5696 transitions. Word has length 363 [2022-11-18 21:06:55,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:55,000 INFO L495 AbstractCegarLoop]: Abstraction has 3445 states and 5696 transitions. [2022-11-18 21:06:55,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 34.935483870967744) internal successors, (1083), 31 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 5696 transitions. [2022-11-18 21:06:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-11-18 21:06:55,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:55,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:55,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:55,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:06:55,227 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:06:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1077508743, now seen corresponding path program 1 times [2022-11-18 21:06:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:06:55,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69215730] [2022-11-18 21:06:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:04,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:04,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69215730] [2022-11-18 21:07:04,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69215730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:04,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225228807] [2022-11-18 21:07:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:04,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:04,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:04,115 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:04,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5894598c-2392-4261-98f2-ce9c063ded60/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 21:07:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 2850 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 21:07:05,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:10,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:16,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225228807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:16,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:07:16,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 14] total 33 [2022-11-18 21:07:16,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27198805] [2022-11-18 21:07:16,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:16,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 21:07:16,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:17,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 21:07:17,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 21:07:17,000 INFO L87 Difference]: Start difference. First operand 3445 states and 5696 transitions. Second operand has 33 states, 33 states have (on average 33.0) internal successors, (1089), 33 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)