./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8 --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 32bit --witnessprinter.graph.data.programhash 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 --- 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-e04fb08 [2022-11-16 11:04:43,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:04:43,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:04:43,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:04:43,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:04:43,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:04:43,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:04:43,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:04:43,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:04:43,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:04:43,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:04:43,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:04:43,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:04:43,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:04:43,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:04:43,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:04:43,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:04:43,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:04:43,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:04:43,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:04:43,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:04:43,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:04:43,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:04:43,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:04:43,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:04:43,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:04:43,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:04:43,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:04:43,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:04:43,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:04:43,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:04:43,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:04:43,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:04:43,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:04:43,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:04:43,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:04:43,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:04:43,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:04:43,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:04:43,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:04:43,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:04:43,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:04:43,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:04:43,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:04:43,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:04:43,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:04:43,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:04:43,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:04:43,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:04:43,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:04:43,782 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:04:43,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:04:43,782 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:04:43,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:04:43,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:04:43,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:04:43,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:04:43,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:04:43,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:04:43,786 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:04:43,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:04:43,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:04:43,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:04:43,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:04:43,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:04:43,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:04:43,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:04:43,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:04:43,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:04:43,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:04:43,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:04:43,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:04:43,792 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:04:43,792 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:04:43,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:04:43,798 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_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 [2022-11-16 11:04:44,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:04:44,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:04:44,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:04:44,127 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:04:44,127 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:04:44,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-tiling/rewnif.c [2022-11-16 11:04:44,227 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/data/95fcc9f35/fb3127c2d46d4be09b9cd139d8dbc865/FLAG07f527ab6 [2022-11-16 11:04:44,652 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:04:44,653 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/sv-benchmarks/c/array-tiling/rewnif.c [2022-11-16 11:04:44,658 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/data/95fcc9f35/fb3127c2d46d4be09b9cd139d8dbc865/FLAG07f527ab6 [2022-11-16 11:04:45,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/data/95fcc9f35/fb3127c2d46d4be09b9cd139d8dbc865 [2022-11-16 11:04:45,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:04:45,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:04:45,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:04:45,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:04:45,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:04:45,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee78c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45, skipping insertion in model container [2022-11-16 11:04:45,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:04:45,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:04:45,275 WARN L229 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_c5acaf54-e176-4151-b05e-05142c6f589a/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2022-11-16 11:04:45,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:04:45,300 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:04:45,310 WARN L229 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_c5acaf54-e176-4151-b05e-05142c6f589a/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2022-11-16 11:04:45,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:04:45,327 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:04:45,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45 WrapperNode [2022-11-16 11:04:45,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:04:45,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:04:45,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:04:45,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:04:45,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,359 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-11-16 11:04:45,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:04:45,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:04:45,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:04:45,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:04:45,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,380 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:04:45,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:04:45,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:04:45,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:04:45,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (1/1) ... [2022-11-16 11:04:45,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:04:45,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:45,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:04:45,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:04:45,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:04:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:04:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:04:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:04:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:04:45,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:04:45,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:04:45,516 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:04:45,517 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:04:45,661 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:04:45,668 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:04:45,668 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:04:45,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:04:45 BoogieIcfgContainer [2022-11-16 11:04:45,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:04:45,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:04:45,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:04:45,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:04:45,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:04:45" (1/3) ... [2022-11-16 11:04:45,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d426b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:04:45, skipping insertion in model container [2022-11-16 11:04:45,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:45" (2/3) ... [2022-11-16 11:04:45,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d426b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:04:45, skipping insertion in model container [2022-11-16 11:04:45,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:04:45" (3/3) ... [2022-11-16 11:04:45,684 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnif.c [2022-11-16 11:04:45,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:04:45,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:04:45,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:04:45,764 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;@14896f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:04:45,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:04:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:45,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:04:45,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:45,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:45,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-11-16 11:04:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:45,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595242717] [2022-11-16 11:04:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:45,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:45,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:45,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595242717] [2022-11-16 11:04:45,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595242717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:45,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:45,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:04:45,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963656490] [2022-11-16 11:04:45,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:45,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:04:45,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:04:45,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:04:45,996 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:46,011 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-11-16 11:04:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:04:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:04:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:46,021 INFO L225 Difference]: With dead ends: 29 [2022-11-16 11:04:46,021 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 11:04:46,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:04:46,028 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:46,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:04:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 11:04:46,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-16 11:04:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-16 11:04:46,060 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-16 11:04:46,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:46,060 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-16 11:04:46,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-16 11:04:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:04:46,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:46,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:46,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:04:46,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-11-16 11:04:46,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:46,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673446506] [2022-11-16 11:04:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:46,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:46,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:46,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673446506] [2022-11-16 11:04:46,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673446506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:46,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:46,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:04:46,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195840937] [2022-11-16 11:04:46,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:46,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:04:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:04:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:04:46,193 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:46,233 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-11-16 11:04:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:04:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:04:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:46,235 INFO L225 Difference]: With dead ends: 29 [2022-11-16 11:04:46,235 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 11:04:46,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:04:46,237 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:46,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:04:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 11:04:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-11-16 11:04:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-16 11:04:46,250 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-16 11:04:46,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:46,250 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-16 11:04:46,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,251 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-16 11:04:46,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:04:46,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:46,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:46,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:04:46,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-11-16 11:04:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:46,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682423807] [2022-11-16 11:04:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:46,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:46,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:46,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682423807] [2022-11-16 11:04:46,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682423807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125932676] [2022-11-16 11:04:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:46,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:46,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:46,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:04:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:46,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:04:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:46,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:46,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125932676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:46,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:46,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:04:46,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672337391] [2022-11-16 11:04:46,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:46,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:04:46,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:46,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:04:46,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:04:46,793 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:46,914 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-11-16 11:04:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:04:46,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:04:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:46,917 INFO L225 Difference]: With dead ends: 34 [2022-11-16 11:04:46,917 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 11:04:46,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:04:46,919 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:46,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:04:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 11:04:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-11-16 11:04:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-16 11:04:46,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-11-16 11:04:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:46,925 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-16 11:04:46,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-16 11:04:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:04:46,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:46,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:46,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:04:47,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:47,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:47,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-11-16 11:04:47,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:47,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412329830] [2022-11-16 11:04:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:47,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:47,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:47,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412329830] [2022-11-16 11:04:47,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412329830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:47,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266274959] [2022-11-16 11:04:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:47,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:47,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:47,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:04:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:47,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:04:47,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:47,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:04:48,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:04:48,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:04:48,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:04:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:48,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:48,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-16 11:04:48,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 138 [2022-11-16 11:04:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:48,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266274959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:48,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:48,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-11-16 11:04:48,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037246496] [2022-11-16 11:04:48,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:48,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:04:48,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:04:48,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:04:48,494 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:48,748 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-11-16 11:04:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:04:48,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:04:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:48,751 INFO L225 Difference]: With dead ends: 28 [2022-11-16 11:04:48,751 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 11:04:48,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:04:48,756 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:48,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 40 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 100 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-11-16 11:04:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 11:04:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-16 11:04:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-16 11:04:48,777 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-11-16 11:04:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:48,778 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-16 11:04:48,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-16 11:04:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:04:48,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:48,779 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:48,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:48,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:48,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-11-16 11:04:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:48,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020527400] [2022-11-16 11:04:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:48,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:49,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:49,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020527400] [2022-11-16 11:04:49,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020527400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:49,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824606273] [2022-11-16 11:04:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:49,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:49,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:49,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:49,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:04:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:04:49,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:49,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:04:49,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:04:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:49,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:49,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:04:49,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:04:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:49,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824606273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:49,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:49,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-11-16 11:04:49,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274540507] [2022-11-16 11:04:49,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:49,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:04:49,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:04:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:04:49,705 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:50,024 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-11-16 11:04:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:04:50,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 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 20 [2022-11-16 11:04:50,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:50,026 INFO L225 Difference]: With dead ends: 60 [2022-11-16 11:04:50,026 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 11:04:50,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:04:50,028 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:50,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 87 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:04:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 11:04:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-11-16 11:04:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-16 11:04:50,036 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2022-11-16 11:04:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:50,037 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-16 11:04:50,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-16 11:04:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 11:04:50,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:50,038 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:50,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:50,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:50,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2022-11-16 11:04:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152868651] [2022-11-16 11:04:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:50,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:50,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152868651] [2022-11-16 11:04:50,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152868651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819723808] [2022-11-16 11:04:50,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:04:50,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:50,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:50,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:50,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:04:50,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:04:50,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:04:50,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:04:50,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:50,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:50,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819723808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:50,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:50,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-16 11:04:50,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051980413] [2022-11-16 11:04:50,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:04:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:04:50,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:04:50,640 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:50,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:50,760 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-11-16 11:04:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:04:50,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 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 24 [2022-11-16 11:04:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:50,762 INFO L225 Difference]: With dead ends: 85 [2022-11-16 11:04:50,762 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 11:04:50,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:04:50,763 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:50,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:04:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 11:04:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-11-16 11:04:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-11-16 11:04:50,771 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2022-11-16 11:04:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:50,771 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-11-16 11:04:50,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-11-16 11:04:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:04:50,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:50,773 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:50,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:50,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:50,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1364521933, now seen corresponding path program 3 times [2022-11-16 11:04:50,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:50,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725229802] [2022-11-16 11:04:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:50,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:51,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:51,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725229802] [2022-11-16 11:04:51,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725229802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:51,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793564760] [2022-11-16 11:04:51,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:04:51,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:51,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:51,462 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:51,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:04:51,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 11:04:51,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:04:51,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:04:51,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:51,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:04:51,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-16 11:04:51,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-16 11:04:51,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:04:51,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:04:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:51,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:52,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-16 11:04:52,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 131 [2022-11-16 11:04:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:52,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793564760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:52,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:52,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 23 [2022-11-16 11:04:52,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189876988] [2022-11-16 11:04:52,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:52,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:04:52,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:52,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:04:52,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:04:52,250 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:52,778 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2022-11-16 11:04:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:04:52,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-16 11:04:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:52,779 INFO L225 Difference]: With dead ends: 88 [2022-11-16 11:04:52,779 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 11:04:52,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:04:52,781 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 146 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:52,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 104 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 245 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-11-16 11:04:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 11:04:52,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 29. [2022-11-16 11:04:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-16 11:04:52,789 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2022-11-16 11:04:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:52,789 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-16 11:04:52,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-16 11:04:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:04:52,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:52,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:52,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:52,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:04:52,991 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 4 times [2022-11-16 11:04:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:52,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154105977] [2022-11-16 11:04:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:52,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:53,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:53,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154105977] [2022-11-16 11:04:53,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154105977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:53,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985846623] [2022-11-16 11:04:53,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:04:53,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:53,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:53,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:53,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:04:53,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:04:53,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:04:53,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:04:53,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:53,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:04:53,807 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 11:04:53,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 11:04:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:53,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:54,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-16 11:04:54,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-16 11:04:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:54,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985846623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:54,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:54,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-11-16 11:04:54,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606406262] [2022-11-16 11:04:54,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:54,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:04:54,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:04:54,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:04:54,220 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:54,891 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-11-16 11:04:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:04:54,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-16 11:04:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:54,892 INFO L225 Difference]: With dead ends: 80 [2022-11-16 11:04:54,892 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 11:04:54,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=292, Invalid=1778, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:04:54,894 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:54,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 158 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 246 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-11-16 11:04:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 11:04:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2022-11-16 11:04:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-11-16 11:04:54,913 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 28 [2022-11-16 11:04:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:54,915 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-11-16 11:04:54,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-11-16 11:04:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:04:54,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:54,920 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:54,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:55,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:55,126 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:55,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash 367413348, now seen corresponding path program 5 times [2022-11-16 11:04:55,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:55,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928639788] [2022-11-16 11:04:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:55,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:55,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:55,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928639788] [2022-11-16 11:04:55,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928639788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:55,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127732899] [2022-11-16 11:04:55,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:04:55,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:55,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:55,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:55,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:04:55,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 11:04:55,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:04:55,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 11:04:55,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:55,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:04:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:04:55,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:04:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:04:55,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:04:56,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:04:56,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:04:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:56,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:56,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-16 11:04:56,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 129 [2022-11-16 11:04:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:56,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127732899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:56,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:56,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 29 [2022-11-16 11:04:56,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778647867] [2022-11-16 11:04:56,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:56,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 11:04:56,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 11:04:56,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:04:56,626 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:57,129 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-11-16 11:04:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:04:57,129 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-16 11:04:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:57,130 INFO L225 Difference]: With dead ends: 66 [2022-11-16 11:04:57,130 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 11:04:57,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:04:57,132 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:57,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 87 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 386 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-11-16 11:04:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 11:04:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2022-11-16 11:04:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-16 11:04:57,140 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2022-11-16 11:04:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:57,140 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-16 11:04:57,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-16 11:04:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:04:57,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:57,141 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:57,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:57,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:57,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:57,348 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 6 times [2022-11-16 11:04:57,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:57,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666419222] [2022-11-16 11:04:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:57,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:57,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:57,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666419222] [2022-11-16 11:04:57,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666419222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:57,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919032759] [2022-11-16 11:04:57,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:04:57,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:57,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:57,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:57,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:04:57,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-16 11:04:57,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:04:57,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:04:57,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:57,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:04:58,387 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 11:04:58,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 11:04:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:58,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:58,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-16 11:04:58,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-16 11:04:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:58,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919032759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:58,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:58,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 31 [2022-11-16 11:04:58,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892191783] [2022-11-16 11:04:58,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:58,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:04:58,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:58,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:04:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:04:58,967 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:59,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:59,593 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-11-16 11:04:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:04:59,593 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 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 36 [2022-11-16 11:04:59,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:59,594 INFO L225 Difference]: With dead ends: 86 [2022-11-16 11:04:59,594 INFO L226 Difference]: Without dead ends: 63 [2022-11-16 11:04:59,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=311, Invalid=1669, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:04:59,596 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:59,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 96 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 201 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-11-16 11:04:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-16 11:04:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-11-16 11:04:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-11-16 11:04:59,608 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 36 [2022-11-16 11:04:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:59,608 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-11-16 11:04:59,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-11-16 11:04:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:04:59,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:59,609 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:59,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:59,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:04:59,820 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:59,820 INFO L85 PathProgramCache]: Analyzing trace with hash -470542059, now seen corresponding path program 7 times [2022-11-16 11:04:59,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:59,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523414857] [2022-11-16 11:04:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:59,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:00,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523414857] [2022-11-16 11:05:00,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523414857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256926111] [2022-11-16 11:05:00,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:05:00,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:00,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:00,602 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:00,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:05:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:05:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:00,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:05:00,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-16 11:05:00,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-16 11:05:00,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-16 11:05:01,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:05:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:01,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:01,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-16 11:05:01,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 546 treesize of output 530 [2022-11-16 11:05:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:02,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256926111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:02,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:02,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16] total 32 [2022-11-16 11:05:02,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119908508] [2022-11-16 11:05:02,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:02,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:05:02,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:02,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:05:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:05:02,155 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:03,323 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2022-11-16 11:05:03,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 11:05:03,323 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-16 11:05:03,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:03,324 INFO L225 Difference]: With dead ends: 142 [2022-11-16 11:05:03,324 INFO L226 Difference]: Without dead ends: 140 [2022-11-16 11:05:03,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=439, Invalid=3221, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 11:05:03,327 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 175 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:03,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 282 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 632 Invalid, 0 Unknown, 158 Unchecked, 0.4s Time] [2022-11-16 11:05:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-16 11:05:03,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 65. [2022-11-16 11:05:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-11-16 11:05:03,347 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 44 [2022-11-16 11:05:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:03,348 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-11-16 11:05:03,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-11-16 11:05:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:05:03,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:03,350 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:03,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:03,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:03,556 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 8 times [2022-11-16 11:05:03,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162783809] [2022-11-16 11:05:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:03,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:04,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:04,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162783809] [2022-11-16 11:05:04,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162783809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:04,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906386266] [2022-11-16 11:05:04,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:05:04,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:04,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:04,058 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:04,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:05:04,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:05:04,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:05:04,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:04,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:05:04,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:05:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:04,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:04,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:05:04,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:05:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:04,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906386266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:04,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:04,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-11-16 11:05:04,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724751281] [2022-11-16 11:05:04,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:04,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:05:04,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:04,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:05:04,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:05:04,779 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:05,508 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2022-11-16 11:05:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:05:05,509 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-16 11:05:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:05,509 INFO L225 Difference]: With dead ends: 124 [2022-11-16 11:05:05,510 INFO L226 Difference]: Without dead ends: 122 [2022-11-16 11:05:05,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:05:05,512 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 100 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:05,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 307 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:05:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-16 11:05:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 73. [2022-11-16 11:05:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2022-11-16 11:05:05,531 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 44 [2022-11-16 11:05:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:05,531 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2022-11-16 11:05:05,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2022-11-16 11:05:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 11:05:05,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:05,532 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:05,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:05:05,738 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 9 times [2022-11-16 11:05:05,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:05,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868196987] [2022-11-16 11:05:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:05,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:05,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868196987] [2022-11-16 11:05:05,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868196987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:05,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907300252] [2022-11-16 11:05:05,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:05:05,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:05,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:05,948 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:05,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:05:06,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:05:06,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:06,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:05:06,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:06,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:06,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907300252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:06,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:06,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-11-16 11:05:06,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238017703] [2022-11-16 11:05:06,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:06,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:05:06,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:05:06,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:05:06,441 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:06,645 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2022-11-16 11:05:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:05:06,646 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-16 11:05:06,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:06,647 INFO L225 Difference]: With dead ends: 142 [2022-11-16 11:05:06,647 INFO L226 Difference]: Without dead ends: 111 [2022-11-16 11:05:06,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:05:06,649 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 111 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:06,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 96 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:05:06,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-16 11:05:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2022-11-16 11:05:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-11-16 11:05:06,675 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 48 [2022-11-16 11:05:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:06,677 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-11-16 11:05:06,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-11-16 11:05:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 11:05:06,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:06,679 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:06,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 11:05:06,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:05:06,884 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:06,885 INFO L85 PathProgramCache]: Analyzing trace with hash 730938950, now seen corresponding path program 10 times [2022-11-16 11:05:06,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:06,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006199087] [2022-11-16 11:05:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:06,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:07,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:07,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006199087] [2022-11-16 11:05:07,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006199087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:07,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311059687] [2022-11-16 11:05:07,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:05:07,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:07,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:07,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:07,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:05:07,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:05:07,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:07,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 11:05:07,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:07,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:05:07,962 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:05:07,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:05:07,984 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:05:07,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:05:08,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:05:08,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-16 11:05:08,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:05:08,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2022-11-16 11:05:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:08,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:08,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-16 11:05:08,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 67 [2022-11-16 11:05:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:08,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311059687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:08,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:08,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 37 [2022-11-16 11:05:08,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564057311] [2022-11-16 11:05:08,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:08,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:05:08,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:08,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:05:08,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:05:08,964 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 37 states, 37 states have (on average 3.027027027027027) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:09,842 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-11-16 11:05:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:05:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.027027027027027) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 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 52 [2022-11-16 11:05:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:09,844 INFO L225 Difference]: With dead ends: 117 [2022-11-16 11:05:09,844 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 11:05:09,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=2299, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 11:05:09,846 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 175 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:09,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 208 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 807 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-11-16 11:05:09,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 11:05:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2022-11-16 11:05:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.069767441860465) internal successors, (92), 86 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2022-11-16 11:05:09,877 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 52 [2022-11-16 11:05:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:09,877 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2022-11-16 11:05:09,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.027027027027027) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2022-11-16 11:05:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:05:09,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:09,878 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:09,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:10,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:05:10,083 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:10,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:10,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1295276474, now seen corresponding path program 11 times [2022-11-16 11:05:10,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:10,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945038841] [2022-11-16 11:05:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:10,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:11,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:11,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945038841] [2022-11-16 11:05:11,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945038841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:11,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528412035] [2022-11-16 11:05:11,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:05:11,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:11,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:11,362 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:11,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:05:11,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-16 11:05:11,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:11,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-16 11:05:11,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:11,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:05:11,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:11,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 11:05:11,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:11,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:05:11,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:11,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 11:05:11,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:11,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:05:11,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:11,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 11:05:11,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:11,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:05:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:11,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 11:05:11,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:11,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:05:12,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:12,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:05:12,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:05:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:12,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:13,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-16 11:05:13,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 258 [2022-11-16 11:05:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:05:14,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528412035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:14,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:14,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2022-11-16 11:05:14,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20249746] [2022-11-16 11:05:14,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:14,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:05:14,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:05:14,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:05:14,123 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:14,922 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-11-16 11:05:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:05:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 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 56 [2022-11-16 11:05:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:14,924 INFO L225 Difference]: With dead ends: 98 [2022-11-16 11:05:14,924 INFO L226 Difference]: Without dead ends: 96 [2022-11-16 11:05:14,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 89 SyntacticMatches, 15 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=361, Invalid=2189, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 11:05:14,925 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:14,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 131 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 811 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2022-11-16 11:05:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-16 11:05:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2022-11-16 11:05:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-16 11:05:14,942 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2022-11-16 11:05:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:14,943 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-16 11:05:14,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-16 11:05:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:05:14,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:14,944 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:14,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:15,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:15,150 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:15,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 12 times [2022-11-16 11:05:15,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:15,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666239909] [2022-11-16 11:05:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:15,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:15,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666239909] [2022-11-16 11:05:15,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666239909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659329351] [2022-11-16 11:05:15,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:05:15,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:15,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:15,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:15,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:05:15,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-16 11:05:15,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:15,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:05:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:15,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:16,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659329351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:16,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:16,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2022-11-16 11:05:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790833075] [2022-11-16 11:05:16,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:16,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:05:16,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:05:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:05:16,029 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:16,263 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-11-16 11:05:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:05:16,263 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-16 11:05:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:16,264 INFO L225 Difference]: With dead ends: 100 [2022-11-16 11:05:16,264 INFO L226 Difference]: Without dead ends: 65 [2022-11-16 11:05:16,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:05:16,265 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 110 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:16,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 89 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:05:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-16 11:05:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-11-16 11:05:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-16 11:05:16,282 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-11-16 11:05:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:16,283 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-16 11:05:16,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-16 11:05:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 11:05:16,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:16,284 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:16,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:16,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:05:16,500 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 13 times [2022-11-16 11:05:16,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:16,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473981353] [2022-11-16 11:05:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:16,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:17,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:17,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473981353] [2022-11-16 11:05:17,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473981353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:17,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625190024] [2022-11-16 11:05:17,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:05:17,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:17,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:17,123 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:17,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:05:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:17,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 11:05:17,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:17,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:05:17,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:05:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:17,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:18,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:05:18,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:05:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:18,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625190024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:18,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:18,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-11-16 11:05:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242303654] [2022-11-16 11:05:18,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:18,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:05:18,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:05:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:05:18,114 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:19,211 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2022-11-16 11:05:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:05:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-16 11:05:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:19,214 INFO L225 Difference]: With dead ends: 120 [2022-11-16 11:05:19,214 INFO L226 Difference]: Without dead ends: 118 [2022-11-16 11:05:19,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 11:05:19,216 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 166 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:19,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 474 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:05:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-16 11:05:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2022-11-16 11:05:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-11-16 11:05:19,249 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 60 [2022-11-16 11:05:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:19,249 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-11-16 11:05:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-11-16 11:05:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:05:19,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:19,250 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:19,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 11:05:19,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:05:19,454 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:19,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 14 times [2022-11-16 11:05:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:19,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084922690] [2022-11-16 11:05:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:19,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:19,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084922690] [2022-11-16 11:05:19,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084922690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:19,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737542689] [2022-11-16 11:05:19,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:05:19,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:19,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:19,751 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:19,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:05:19,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:05:19,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:19,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:05:19,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:20,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:20,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737542689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:20,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:20,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2022-11-16 11:05:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397385938] [2022-11-16 11:05:20,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:20,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:05:20,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:05:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:05:20,382 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:20,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:20,651 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2022-11-16 11:05:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:05:20,652 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-16 11:05:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:20,653 INFO L225 Difference]: With dead ends: 146 [2022-11-16 11:05:20,653 INFO L226 Difference]: Without dead ends: 107 [2022-11-16 11:05:20,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:05:20,655 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 142 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:20,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 111 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:05:20,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-16 11:05:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2022-11-16 11:05:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-11-16 11:05:20,685 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 64 [2022-11-16 11:05:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:20,685 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-11-16 11:05:20,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-11-16 11:05:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 11:05:20,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:20,687 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:20,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:20,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:05:20,891 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -846428632, now seen corresponding path program 15 times [2022-11-16 11:05:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:20,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084124283] [2022-11-16 11:05:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:20,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:21,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:21,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084124283] [2022-11-16 11:05:21,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084124283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:21,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408883868] [2022-11-16 11:05:21,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:05:21,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:21,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:21,683 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:21,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:05:22,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-16 11:05:22,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 11:05:22,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:22,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:05:22,206 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:05:22,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:05:22,224 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:05:22,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:05:22,275 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:05:22,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:05:22,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:05:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 3 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:22,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:22,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:05:22,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:05:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:23,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408883868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:23,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:23,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22] total 33 [2022-11-16 11:05:23,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408915568] [2022-11-16 11:05:23,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:23,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:05:23,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:23,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:05:23,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:05:23,018 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:24,156 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2022-11-16 11:05:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 11:05:24,156 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-16 11:05:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:24,157 INFO L225 Difference]: With dead ends: 115 [2022-11-16 11:05:24,157 INFO L226 Difference]: Without dead ends: 113 [2022-11-16 11:05:24,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 116 SyntacticMatches, 10 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 11:05:24,160 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 120 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:24,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 420 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:05:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-16 11:05:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2022-11-16 11:05:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-11-16 11:05:24,183 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2022-11-16 11:05:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:24,184 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-11-16 11:05:24,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-11-16 11:05:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 11:05:24,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:24,185 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:24,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:24,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:24,391 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:24,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 16 times [2022-11-16 11:05:24,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:24,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59794574] [2022-11-16 11:05:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:25,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:25,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59794574] [2022-11-16 11:05:25,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59794574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:25,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872359876] [2022-11-16 11:05:25,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:05:25,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:25,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:25,016 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:25,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:05:25,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:05:25,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:25,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 11:05:25,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:25,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:05:25,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:05:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:25,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:26,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:05:26,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:05:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:26,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872359876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:26,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:26,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2022-11-16 11:05:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366287151] [2022-11-16 11:05:26,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:26,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 11:05:26,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 11:05:26,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 11:05:26,914 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 52 states, 52 states have (on average 3.2115384615384617) internal successors, (167), 52 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:31,489 INFO L93 Difference]: Finished difference Result 205 states and 217 transitions. [2022-11-16 11:05:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-16 11:05:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.2115384615384617) internal successors, (167), 52 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-16 11:05:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:31,490 INFO L225 Difference]: With dead ends: 205 [2022-11-16 11:05:31,490 INFO L226 Difference]: Without dead ends: 203 [2022-11-16 11:05:31,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4867 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1717, Invalid=14539, Unknown=0, NotChecked=0, Total=16256 [2022-11-16 11:05:31,496 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 472 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:31,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 614 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:05:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-16 11:05:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 121. [2022-11-16 11:05:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-11-16 11:05:31,530 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 68 [2022-11-16 11:05:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:31,530 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-11-16 11:05:31,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.2115384615384617) internal successors, (167), 52 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-11-16 11:05:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 11:05:31,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:31,531 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:31,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:31,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:31,732 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:31,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:31,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1199298343, now seen corresponding path program 17 times [2022-11-16 11:05:31,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:31,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366544985] [2022-11-16 11:05:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:31,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:32,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:32,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366544985] [2022-11-16 11:05:32,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366544985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:32,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281133524] [2022-11-16 11:05:32,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:05:32,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:32,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:32,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:32,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:05:33,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-16 11:05:33,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:33,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 11:05:33,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:33,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:05:33,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:33,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:05:33,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:33,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:05:33,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:05:34,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:05:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:34,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:34,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-16 11:05:34,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2022-11-16 11:05:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:34,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281133524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:34,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:34,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25] total 49 [2022-11-16 11:05:34,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510850296] [2022-11-16 11:05:34,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:34,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 11:05:34,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:34,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 11:05:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2130, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:05:34,761 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 49 states, 49 states have (on average 3.306122448979592) internal successors, (162), 49 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:36,149 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2022-11-16 11:05:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:05:36,150 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.306122448979592) internal successors, (162), 49 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-16 11:05:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:36,151 INFO L225 Difference]: With dead ends: 205 [2022-11-16 11:05:36,151 INFO L226 Difference]: Without dead ends: 203 [2022-11-16 11:05:36,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 127 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=546, Invalid=5616, Unknown=0, NotChecked=0, Total=6162 [2022-11-16 11:05:36,152 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 244 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:36,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 399 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1419 Invalid, 0 Unknown, 33 Unchecked, 0.7s Time] [2022-11-16 11:05:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-16 11:05:36,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 113. [2022-11-16 11:05:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-11-16 11:05:36,205 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 76 [2022-11-16 11:05:36,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:36,205 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-11-16 11:05:36,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.306122448979592) internal successors, (162), 49 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-11-16 11:05:36,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 11:05:36,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:36,206 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:36,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 11:05:36,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:05:36,407 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:36,407 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 18 times [2022-11-16 11:05:36,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:36,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130103377] [2022-11-16 11:05:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:36,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:37,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:37,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130103377] [2022-11-16 11:05:37,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130103377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:37,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259405702] [2022-11-16 11:05:37,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:05:37,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:37,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:37,174 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:37,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:05:37,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-16 11:05:37,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:37,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:05:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:38,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:05:39,132 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 11:05:39,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 11:05:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 120 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:39,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:40,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-16 11:05:40,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-16 11:05:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 112 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:40,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259405702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:40,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:40,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 55 [2022-11-16 11:05:40,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920412458] [2022-11-16 11:05:40,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:40,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 11:05:40,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:40,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 11:05:40,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2626, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:05:40,527 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 55 states, 55 states have (on average 3.4) internal successors, (187), 55 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:43,495 INFO L93 Difference]: Finished difference Result 241 states and 246 transitions. [2022-11-16 11:05:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-16 11:05:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.4) internal successors, (187), 55 states have internal predecessors, (187), 0 states have call successors, (0), 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 76 [2022-11-16 11:05:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:43,498 INFO L225 Difference]: With dead ends: 241 [2022-11-16 11:05:43,498 INFO L226 Difference]: Without dead ends: 132 [2022-11-16 11:05:43,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 125 SyntacticMatches, 9 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1197, Invalid=11013, Unknown=0, NotChecked=0, Total=12210 [2022-11-16 11:05:43,501 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 165 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:43,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1060 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1232 Invalid, 0 Unknown, 230 Unchecked, 0.6s Time] [2022-11-16 11:05:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-16 11:05:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2022-11-16 11:05:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-11-16 11:05:43,529 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 76 [2022-11-16 11:05:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:43,530 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-11-16 11:05:43,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.4) internal successors, (187), 55 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-11-16 11:05:43,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 11:05:43,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:43,531 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:43,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:43,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 11:05:43,731 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:43,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1640095734, now seen corresponding path program 19 times [2022-11-16 11:05:43,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:43,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726606102] [2022-11-16 11:05:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:43,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:44,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:44,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726606102] [2022-11-16 11:05:44,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726606102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:44,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947932698] [2022-11-16 11:05:44,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:05:44,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:44,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:44,973 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:44,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:05:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 11:05:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:45,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:05:45,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:45,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-16 11:05:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:45,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-16 11:05:45,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:05:45,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:05:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:45,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:46,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-16 11:05:46,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2226 treesize of output 2162 [2022-11-16 11:05:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:52,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947932698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:52,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:52,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 26] total 58 [2022-11-16 11:05:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360680697] [2022-11-16 11:05:52,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:52,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 11:05:52,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 11:05:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=3050, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 11:05:52,990 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 58 states, 58 states have (on average 3.5) internal successors, (203), 58 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:54,633 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-11-16 11:05:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 11:05:54,634 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.5) internal successors, (203), 58 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-16 11:05:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:54,635 INFO L225 Difference]: With dead ends: 137 [2022-11-16 11:05:54,635 INFO L226 Difference]: Without dead ends: 135 [2022-11-16 11:05:54,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=494, Invalid=5826, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 11:05:54,636 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 225 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:54,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 535 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1926 Invalid, 0 Unknown, 123 Unchecked, 0.9s Time] [2022-11-16 11:05:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-16 11:05:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 85. [2022-11-16 11:05:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-11-16 11:05:54,664 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2022-11-16 11:05:54,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:54,665 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-11-16 11:05:54,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.5) internal successors, (203), 58 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:54,665 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-11-16 11:05:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 11:05:54,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:54,666 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:54,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:54,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:54,869 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 20 times [2022-11-16 11:05:54,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:54,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232716495] [2022-11-16 11:05:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:54,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:55,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:55,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232716495] [2022-11-16 11:05:55,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232716495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:55,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375025344] [2022-11-16 11:05:55,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:05:55,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:55,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:55,818 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:55,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:05:55,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:05:55,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:55,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:05:55,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:56,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:05:57,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:05:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:57,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:57,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:05:57,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:05:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:57,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375025344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:57,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:57,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 58 [2022-11-16 11:05:57,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168704417] [2022-11-16 11:05:57,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:57,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 11:05:57,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 11:05:57,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3112, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 11:05:57,860 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 58 states, 58 states have (on average 3.5517241379310347) internal successors, (206), 58 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:00,484 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2022-11-16 11:06:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-16 11:06:00,485 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.5517241379310347) internal successors, (206), 58 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-16 11:06:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:00,486 INFO L225 Difference]: With dead ends: 156 [2022-11-16 11:06:00,486 INFO L226 Difference]: Without dead ends: 154 [2022-11-16 11:06:00,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=591, Invalid=9711, Unknown=0, NotChecked=0, Total=10302 [2022-11-16 11:06:00,488 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 274 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2621 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:00,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 919 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2621 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:06:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-16 11:06:00,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 101. [2022-11-16 11:06:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-11-16 11:06:00,539 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 84 [2022-11-16 11:06:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:00,540 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-11-16 11:06:00,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.5517241379310347) internal successors, (206), 58 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-11-16 11:06:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 11:06:00,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:00,541 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:00,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:00,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:00,752 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:00,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2110702651, now seen corresponding path program 21 times [2022-11-16 11:06:00,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:00,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584049229] [2022-11-16 11:06:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:00,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:01,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:01,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584049229] [2022-11-16 11:06:01,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584049229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:01,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297530266] [2022-11-16 11:06:01,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:01,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:01,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:01,195 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:01,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:06:02,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 11:06:02,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:02,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:06:02,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:02,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:02,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297530266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:02,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:02,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2022-11-16 11:06:02,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744187962] [2022-11-16 11:06:02,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:02,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:06:02,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:02,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:06:02,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:06:02,826 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:03,265 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2022-11-16 11:06:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:06:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-16 11:06:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:03,267 INFO L225 Difference]: With dead ends: 194 [2022-11-16 11:06:03,267 INFO L226 Difference]: Without dead ends: 143 [2022-11-16 11:06:03,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 142 SyntacticMatches, 21 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 11:06:03,270 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 210 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:03,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 178 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:06:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-16 11:06:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2022-11-16 11:06:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-11-16 11:06:03,312 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 88 [2022-11-16 11:06:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:03,312 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-11-16 11:06:03,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-11-16 11:06:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 11:06:03,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:03,314 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:03,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:03,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:06:03,521 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:03,521 INFO L85 PathProgramCache]: Analyzing trace with hash 479669179, now seen corresponding path program 22 times [2022-11-16 11:06:03,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:03,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036675696] [2022-11-16 11:06:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:03,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:04,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:04,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036675696] [2022-11-16 11:06:04,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036675696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788826315] [2022-11-16 11:06:04,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:06:04,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:04,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:04,634 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:04,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:06:05,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:06:05,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:05,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 11:06:05,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:05,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:06:05,660 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:06:05,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:06:05,674 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:06:05,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:06:05,726 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:06:05,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:06:06,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:06:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 3 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:06,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:06,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:06:06,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:06:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:06,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788826315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:06,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:06,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 42 [2022-11-16 11:06:06,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091767169] [2022-11-16 11:06:06,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:06,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 11:06:06,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:06,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 11:06:06,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:06:06,702 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 42 states, 42 states have (on average 3.4285714285714284) internal successors, (144), 42 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:08,348 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2022-11-16 11:06:08,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 11:06:08,349 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4285714285714284) internal successors, (144), 42 states have internal predecessors, (144), 0 states have call successors, (0), 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 92 [2022-11-16 11:06:08,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:08,350 INFO L225 Difference]: With dead ends: 151 [2022-11-16 11:06:08,350 INFO L226 Difference]: Without dead ends: 149 [2022-11-16 11:06:08,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 161 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=340, Invalid=4490, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 11:06:08,352 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 152 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:08,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 649 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:06:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-16 11:06:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2022-11-16 11:06:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-11-16 11:06:08,389 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2022-11-16 11:06:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:08,390 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-11-16 11:06:08,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4285714285714284) internal successors, (144), 42 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-11-16 11:06:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 11:06:08,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:08,391 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:08,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:08,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:06:08,592 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 23 times [2022-11-16 11:06:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:08,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885304625] [2022-11-16 11:06:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:08,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:09,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:09,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885304625] [2022-11-16 11:06:09,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885304625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:09,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438859109] [2022-11-16 11:06:09,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:06:09,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:09,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:09,499 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:09,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:06:09,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-16 11:06:09,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:09,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-16 11:06:09,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:10,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:06:11,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:06:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:11,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:11,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:06:11,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:06:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:11,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438859109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:11,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:11,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2022-11-16 11:06:11,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800096488] [2022-11-16 11:06:11,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:11,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-16 11:06:11,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-16 11:06:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2673, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:06:11,595 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 54 states, 54 states have (on average 3.5185185185185186) internal successors, (190), 54 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:13,784 INFO L93 Difference]: Finished difference Result 168 states and 171 transitions. [2022-11-16 11:06:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-16 11:06:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.5185185185185186) internal successors, (190), 54 states have internal predecessors, (190), 0 states have call successors, (0), 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 92 [2022-11-16 11:06:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:13,785 INFO L225 Difference]: With dead ends: 168 [2022-11-16 11:06:13,785 INFO L226 Difference]: Without dead ends: 166 [2022-11-16 11:06:13,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=493, Invalid=8437, Unknown=0, NotChecked=0, Total=8930 [2022-11-16 11:06:13,787 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 200 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 2568 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:13,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 812 Invalid, 2638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2568 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:06:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-16 11:06:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 109. [2022-11-16 11:06:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-11-16 11:06:13,827 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 92 [2022-11-16 11:06:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:13,827 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-11-16 11:06:13,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.5185185185185186) internal successors, (190), 54 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-11-16 11:06:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 11:06:13,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:13,828 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:13,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:06:14,028 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1469941268, now seen corresponding path program 24 times [2022-11-16 11:06:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:14,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090715923] [2022-11-16 11:06:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:14,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:14,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090715923] [2022-11-16 11:06:14,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090715923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478156211] [2022-11-16 11:06:14,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:06:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:14,484 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:14,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 11:06:15,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-16 11:06:15,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:15,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:06:15,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:15,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:15,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478156211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:15,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:15,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2022-11-16 11:06:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146139407] [2022-11-16 11:06:15,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:15,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 11:06:15,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 11:06:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:06:15,977 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 40 states, 40 states have (on average 3.8) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:16,453 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2022-11-16 11:06:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:06:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.8) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 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 96 [2022-11-16 11:06:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:16,454 INFO L225 Difference]: With dead ends: 210 [2022-11-16 11:06:16,454 INFO L226 Difference]: Without dead ends: 155 [2022-11-16 11:06:16,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 155 SyntacticMatches, 23 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 11:06:16,456 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 216 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:16,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 165 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:06:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-16 11:06:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2022-11-16 11:06:16,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-11-16 11:06:16,504 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 96 [2022-11-16 11:06:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:16,504 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-11-16 11:06:16,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.8) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-11-16 11:06:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-16 11:06:16,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:16,505 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:16,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:16,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 11:06:16,706 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash -905180180, now seen corresponding path program 25 times [2022-11-16 11:06:16,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:16,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650145711] [2022-11-16 11:06:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:16,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:17,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650145711] [2022-11-16 11:06:17,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650145711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889369923] [2022-11-16 11:06:17,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:06:17,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:17,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:18,003 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:18,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 11:06:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:18,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 11:06:18,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:18,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:06:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:18,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:06:18,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:18,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:06:18,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:06:19,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:06:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:19,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:20,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-16 11:06:20,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 129 [2022-11-16 11:06:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:20,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889369923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:20,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:20,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 30] total 59 [2022-11-16 11:06:20,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752365306] [2022-11-16 11:06:20,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:20,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-16 11:06:20,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:20,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-16 11:06:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=3161, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 11:06:20,422 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 59 states, 59 states have (on average 3.5254237288135593) internal successors, (208), 59 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:23,080 INFO L93 Difference]: Finished difference Result 279 states and 285 transitions. [2022-11-16 11:06:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-16 11:06:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.5254237288135593) internal successors, (208), 59 states have internal predecessors, (208), 0 states have call successors, (0), 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 [2022-11-16 11:06:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:23,083 INFO L225 Difference]: With dead ends: 279 [2022-11-16 11:06:23,083 INFO L226 Difference]: Without dead ends: 277 [2022-11-16 11:06:23,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 174 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=764, Invalid=10578, Unknown=0, NotChecked=0, Total=11342 [2022-11-16 11:06:23,085 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 303 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:23,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 923 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2789 Invalid, 0 Unknown, 33 Unchecked, 1.3s Time] [2022-11-16 11:06:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-16 11:06:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 121. [2022-11-16 11:06:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.05) internal successors, (126), 120 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2022-11-16 11:06:23,135 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 100 [2022-11-16 11:06:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:23,136 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2022-11-16 11:06:23,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.5254237288135593) internal successors, (208), 59 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2022-11-16 11:06:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-16 11:06:23,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:23,137 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:23,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:23,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:23,338 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:23,338 INFO L85 PathProgramCache]: Analyzing trace with hash 137728423, now seen corresponding path program 26 times [2022-11-16 11:06:23,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:23,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318720714] [2022-11-16 11:06:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:23,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:24,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318720714] [2022-11-16 11:06:24,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318720714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205455475] [2022-11-16 11:06:24,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:24,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:24,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:24,326 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:24,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 11:06:24,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:06:24,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:24,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 11:06:24,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:25,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:06:25,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:06:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:25,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:26,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:06:26,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:06:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:26,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205455475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:26,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:26,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-11-16 11:06:26,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728166391] [2022-11-16 11:06:26,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:26,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 11:06:26,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:26,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 11:06:26,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2889, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 11:06:26,197 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand has 56 states, 56 states have (on average 3.642857142857143) internal successors, (204), 56 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:28,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:28,606 INFO L93 Difference]: Finished difference Result 236 states and 241 transitions. [2022-11-16 11:06:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-16 11:06:28,606 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.642857142857143) internal successors, (204), 56 states have internal predecessors, (204), 0 states have call successors, (0), 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 [2022-11-16 11:06:28,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:28,607 INFO L225 Difference]: With dead ends: 236 [2022-11-16 11:06:28,607 INFO L226 Difference]: Without dead ends: 234 [2022-11-16 11:06:28,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2264 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=463, Invalid=8467, Unknown=0, NotChecked=0, Total=8930 [2022-11-16 11:06:28,609 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 275 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 3025 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 3098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:28,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 1088 Invalid, 3098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3025 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:06:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-16 11:06:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 129. [2022-11-16 11:06:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.046875) internal successors, (134), 128 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2022-11-16 11:06:28,666 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 100 [2022-11-16 11:06:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:28,667 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2022-11-16 11:06:28,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.642857142857143) internal successors, (204), 56 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2022-11-16 11:06:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-16 11:06:28,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:28,668 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:28,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:28,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:28,874 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:28,875 INFO L85 PathProgramCache]: Analyzing trace with hash -216366051, now seen corresponding path program 27 times [2022-11-16 11:06:28,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:28,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490703569] [2022-11-16 11:06:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:28,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 243 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:29,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490703569] [2022-11-16 11:06:29,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490703569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137371931] [2022-11-16 11:06:29,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:29,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:29,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:29,375 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:29,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 11:06:30,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-16 11:06:30,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:30,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:06:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:30,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:31,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137371931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:31,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:31,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2022-11-16 11:06:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605996609] [2022-11-16 11:06:31,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:31,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 11:06:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 11:06:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:06:31,202 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:31,783 INFO L93 Difference]: Finished difference Result 282 states and 287 transitions. [2022-11-16 11:06:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:06:31,783 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 0 states have call successors, (0), 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 104 [2022-11-16 11:06:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:31,785 INFO L225 Difference]: With dead ends: 282 [2022-11-16 11:06:31,785 INFO L226 Difference]: Without dead ends: 223 [2022-11-16 11:06:31,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 168 SyntacticMatches, 25 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=724, Invalid=2356, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 11:06:31,786 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 252 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:31,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 228 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:06:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-16 11:06:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 129. [2022-11-16 11:06:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0390625) internal successors, (133), 128 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2022-11-16 11:06:31,845 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 104 [2022-11-16 11:06:31,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:31,845 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2022-11-16 11:06:31,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2022-11-16 11:06:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-16 11:06:31,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:31,847 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:31,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:32,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:32,054 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:32,054 INFO L85 PathProgramCache]: Analyzing trace with hash -440827747, now seen corresponding path program 28 times [2022-11-16 11:06:32,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:32,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965899052] [2022-11-16 11:06:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:32,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:33,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:33,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965899052] [2022-11-16 11:06:33,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965899052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:33,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909551383] [2022-11-16 11:06:33,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:06:33,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:33,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:33,423 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:33,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 11:06:34,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:06:34,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 11:06:34,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:34,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:06:34,682 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:06:34,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:06:34,710 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:06:34,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:06:34,770 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:06:34,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:06:35,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:06:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 3 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:35,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:35,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:06:35,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:06:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:36,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909551383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:36,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:36,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 32] total 48 [2022-11-16 11:06:36,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922880576] [2022-11-16 11:06:36,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:36,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 11:06:36,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 11:06:36,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2092, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 11:06:36,004 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 48 states, 48 states have (on average 3.5) internal successors, (168), 48 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:38,340 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2022-11-16 11:06:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 11:06:38,341 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5) internal successors, (168), 48 states have internal predecessors, (168), 0 states have call successors, (0), 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 108 [2022-11-16 11:06:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:38,342 INFO L225 Difference]: With dead ends: 229 [2022-11-16 11:06:38,342 INFO L226 Difference]: Without dead ends: 227 [2022-11-16 11:06:38,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 191 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=392, Invalid=6088, Unknown=0, NotChecked=0, Total=6480 [2022-11-16 11:06:38,344 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 144 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 2828 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:38,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 927 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2828 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:06:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-16 11:06:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 167. [2022-11-16 11:06:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.036144578313253) internal successors, (172), 166 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 172 transitions. [2022-11-16 11:06:38,453 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 172 transitions. Word has length 108 [2022-11-16 11:06:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:38,453 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 172 transitions. [2022-11-16 11:06:38,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5) internal successors, (168), 48 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 172 transitions. [2022-11-16 11:06:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-16 11:06:38,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:38,455 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:38,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:38,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:38,663 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:38,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 29 times [2022-11-16 11:06:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:38,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44801268] [2022-11-16 11:06:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:39,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:39,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44801268] [2022-11-16 11:06:39,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44801268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:39,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234964830] [2022-11-16 11:06:39,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:06:39,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:39,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:39,990 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:39,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 11:06:41,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-16 11:06:41,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:41,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-16 11:06:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:41,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-16 11:06:42,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:06:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:42,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:43,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:06:43,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:06:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:43,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234964830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:43,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:43,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 74 [2022-11-16 11:06:43,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227772652] [2022-11-16 11:06:43,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:43,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 11:06:43,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 11:06:43,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=5074, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 11:06:43,559 INFO L87 Difference]: Start difference. First operand 167 states and 172 transitions. Second operand has 74 states, 74 states have (on average 3.5945945945945947) internal successors, (266), 74 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) [2022-11-16 11:06:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:47,145 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2022-11-16 11:06:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-16 11:06:47,146 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.5945945945945947) internal successors, (266), 74 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 108 [2022-11-16 11:06:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:47,147 INFO L225 Difference]: With dead ends: 244 [2022-11-16 11:06:47,147 INFO L226 Difference]: Without dead ends: 242 [2022-11-16 11:06:47,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4551 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=714, Invalid=14048, Unknown=0, NotChecked=0, Total=14762 [2022-11-16 11:06:47,149 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 349 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 3763 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 3845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:47,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1286 Invalid, 3845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3763 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:06:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-16 11:06:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 175. [2022-11-16 11:06:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0344827586206897) internal successors, (180), 174 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 180 transitions. [2022-11-16 11:06:47,269 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 180 transitions. Word has length 108 [2022-11-16 11:06:47,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:47,270 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 180 transitions. [2022-11-16 11:06:47,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.5945945945945947) internal successors, (266), 74 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) [2022-11-16 11:06:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 180 transitions. [2022-11-16 11:06:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 11:06:47,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:47,271 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:47,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:47,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:47,480 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash -500280803, now seen corresponding path program 30 times [2022-11-16 11:06:47,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:47,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546187562] [2022-11-16 11:06:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:47,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 12 proven. 684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:49,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:49,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546187562] [2022-11-16 11:06:49,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546187562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:49,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331231895] [2022-11-16 11:06:49,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:06:49,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:49,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:49,666 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:49,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 11:06:52,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-16 11:06:52,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:52,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 11:06:52,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:52,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:06:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:52,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:06:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:52,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:06:53,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:53,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:06:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:53,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:06:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:53,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:06:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:53,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:06:53,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:53,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:06:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:53,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:06:53,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:53,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:06:53,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:06:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 3 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:53,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:20,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-16 11:07:20,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 122 [2022-11-16 11:07:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 668 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:07:20,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331231895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:20,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:07:20,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 30] total 74 [2022-11-16 11:07:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614840938] [2022-11-16 11:07:20,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:20,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 11:07:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 11:07:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=5064, Unknown=4, NotChecked=0, Total=5402 [2022-11-16 11:07:20,875 INFO L87 Difference]: Start difference. First operand 175 states and 180 transitions. Second operand has 74 states, 74 states have (on average 3.5405405405405403) internal successors, (262), 74 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:24,773 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2022-11-16 11:07:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-16 11:07:24,773 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.5405405405405403) internal successors, (262), 74 states have internal predecessors, (262), 0 states have call successors, (0), 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 112 [2022-11-16 11:07:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:24,774 INFO L225 Difference]: With dead ends: 249 [2022-11-16 11:07:24,775 INFO L226 Difference]: Without dead ends: 247 [2022-11-16 11:07:24,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 178 SyntacticMatches, 15 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3289 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=754, Invalid=11898, Unknown=4, NotChecked=0, Total=12656 [2022-11-16 11:07:24,776 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 267 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 4526 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 4709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 4526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:24,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1510 Invalid, 4709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 4526 Invalid, 0 Unknown, 96 Unchecked, 2.1s Time] [2022-11-16 11:07:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-16 11:07:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 125. [2022-11-16 11:07:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-11-16 11:07:24,840 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 112 [2022-11-16 11:07:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:24,841 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-11-16 11:07:24,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.5405405405405403) internal successors, (262), 74 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-11-16 11:07:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 11:07:24,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:24,841 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:24,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:25,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 11:07:25,042 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1599316686, now seen corresponding path program 31 times [2022-11-16 11:07:25,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:25,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319091883] [2022-11-16 11:07:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:25,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:25,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:25,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319091883] [2022-11-16 11:07:25,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319091883] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:25,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901057733] [2022-11-16 11:07:25,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:07:25,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:25,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:25,625 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:25,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 11:07:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:07:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:26,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:26,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901057733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:26,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:07:26,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2022-11-16 11:07:26,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737770415] [2022-11-16 11:07:26,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:26,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:07:26,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:07:26,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:07:26,856 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:27,480 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2022-11-16 11:07:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 11:07:27,481 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 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 112 [2022-11-16 11:07:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:27,482 INFO L225 Difference]: With dead ends: 242 [2022-11-16 11:07:27,482 INFO L226 Difference]: Without dead ends: 179 [2022-11-16 11:07:27,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 181 SyntacticMatches, 27 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 11:07:27,483 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 311 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:27,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 221 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:07:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-16 11:07:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 125. [2022-11-16 11:07:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-11-16 11:07:27,573 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 112 [2022-11-16 11:07:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:27,574 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-11-16 11:07:27,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-11-16 11:07:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 11:07:27,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:27,575 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:27,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:27,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 11:07:27,781 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:27,781 INFO L85 PathProgramCache]: Analyzing trace with hash 123488718, now seen corresponding path program 32 times [2022-11-16 11:07:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:27,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800919533] [2022-11-16 11:07:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:27,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 723 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:29,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:29,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800919533] [2022-11-16 11:07:29,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800919533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:29,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804593622] [2022-11-16 11:07:29,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:07:29,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:29,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:29,356 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:29,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 11:07:29,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:07:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-16 11:07:29,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:29,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:07:29,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-16 11:07:29,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-16 11:07:30,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-16 11:07:31,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:07:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 723 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:31,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:32,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-16 11:07:32,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 258 [2022-11-16 11:07:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 723 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:33,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804593622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:33,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:07:33,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 34] total 81 [2022-11-16 11:07:33,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451481520] [2022-11-16 11:07:33,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:33,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-16 11:07:33,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:33,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-16 11:07:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=6011, Unknown=0, NotChecked=0, Total=6480 [2022-11-16 11:07:33,338 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 81 states, 81 states have (on average 3.580246913580247) internal successors, (290), 81 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) [2022-11-16 11:07:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:38,092 INFO L93 Difference]: Finished difference Result 326 states and 332 transitions. [2022-11-16 11:07:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-16 11:07:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.580246913580247) internal successors, (290), 81 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 116 [2022-11-16 11:07:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:38,093 INFO L225 Difference]: With dead ends: 326 [2022-11-16 11:07:38,094 INFO L226 Difference]: Without dead ends: 324 [2022-11-16 11:07:38,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 196 SyntacticMatches, 6 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6481 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1190, Invalid=19980, Unknown=0, NotChecked=0, Total=21170 [2022-11-16 11:07:38,096 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 373 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 3363 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 3930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:38,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1312 Invalid, 3930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3363 Invalid, 0 Unknown, 502 Unchecked, 1.6s Time] [2022-11-16 11:07:38,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-16 11:07:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 137. [2022-11-16 11:07:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 136 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2022-11-16 11:07:38,161 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 116 [2022-11-16 11:07:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:38,162 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2022-11-16 11:07:38,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.580246913580247) internal successors, (290), 81 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) [2022-11-16 11:07:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2022-11-16 11:07:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 11:07:38,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:38,163 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:38,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-16 11:07:38,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 11:07:38,368 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:38,377 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 33 times [2022-11-16 11:07:38,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:38,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836398082] [2022-11-16 11:07:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:39,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:39,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836398082] [2022-11-16 11:07:39,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836398082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:39,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325192303] [2022-11-16 11:07:39,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:07:39,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:39,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:39,519 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:39,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 11:07:41,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-16 11:07:41,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 11:07:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:41,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:07:43,785 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 11:07:43,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 11:07:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 325 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:43,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:45,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-16 11:07:45,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-16 11:07:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 312 proven. 404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:46,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325192303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:46,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:07:46,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 80 [2022-11-16 11:07:46,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425132975] [2022-11-16 11:07:46,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:46,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-16 11:07:46,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:46,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-16 11:07:46,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=5626, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 11:07:46,446 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand has 80 states, 80 states have (on average 3.5875) internal successors, (287), 80 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) [2022-11-16 11:07:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:49,293 INFO L93 Difference]: Finished difference Result 259 states and 265 transitions. [2022-11-16 11:07:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-16 11:07:49,293 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.5875) internal successors, (287), 80 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 116 [2022-11-16 11:07:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:49,295 INFO L225 Difference]: With dead ends: 259 [2022-11-16 11:07:49,295 INFO L226 Difference]: Without dead ends: 196 [2022-11-16 11:07:49,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 198 SyntacticMatches, 14 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1273, Invalid=11609, Unknown=0, NotChecked=0, Total=12882 [2022-11-16 11:07:49,297 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 94 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:49,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 929 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1814 Invalid, 0 Unknown, 205 Unchecked, 0.9s Time] [2022-11-16 11:07:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-16 11:07:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 145. [2022-11-16 11:07:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0347222222222223) internal successors, (149), 144 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2022-11-16 11:07:49,401 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 116 [2022-11-16 11:07:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:49,401 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2022-11-16 11:07:49,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.5875) internal successors, (287), 80 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) [2022-11-16 11:07:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2022-11-16 11:07:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-16 11:07:49,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:49,402 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:49,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:49,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:49,604 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash -816765057, now seen corresponding path program 34 times [2022-11-16 11:07:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:49,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852203229] [2022-11-16 11:07:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:51,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852203229] [2022-11-16 11:07:51,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852203229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289805062] [2022-11-16 11:07:51,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:07:51,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:51,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:51,072 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:51,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 11:07:53,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:07:53,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:53,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 11:07:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:53,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:07:53,397 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:07:53,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:07:53,411 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:07:53,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:07:53,474 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:07:53,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:07:54,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:07:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:54,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:54,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:07:54,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:07:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:07:54,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289805062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:54,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:07:54,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 35] total 53 [2022-11-16 11:07:54,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136758535] [2022-11-16 11:07:54,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:54,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 11:07:54,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:54,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 11:07:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2578, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:07:54,855 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 53 states, 53 states have (on average 3.641509433962264) internal successors, (193), 53 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:57,773 INFO L93 Difference]: Finished difference Result 261 states and 265 transitions. [2022-11-16 11:07:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 11:07:57,774 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.641509433962264) internal successors, (193), 53 states have internal predecessors, (193), 0 states have call successors, (0), 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 124 [2022-11-16 11:07:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:57,775 INFO L225 Difference]: With dead ends: 261 [2022-11-16 11:07:57,775 INFO L226 Difference]: Without dead ends: 259 [2022-11-16 11:07:57,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 222 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=394, Invalid=6916, Unknown=0, NotChecked=0, Total=7310 [2022-11-16 11:07:57,776 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 213 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 3846 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:57,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1312 Invalid, 3920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3846 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:07:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-16 11:07:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 191. [2022-11-16 11:07:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0315789473684212) internal successors, (196), 190 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 196 transitions. [2022-11-16 11:07:57,905 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 196 transitions. Word has length 124 [2022-11-16 11:07:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:57,905 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 196 transitions. [2022-11-16 11:07:57,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.641509433962264) internal successors, (193), 53 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,906 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 196 transitions. [2022-11-16 11:07:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-16 11:07:57,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:57,907 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:57,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:58,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 11:07:58,116 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1678830778, now seen corresponding path program 35 times [2022-11-16 11:07:58,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:58,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262868259] [2022-11-16 11:07:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:58,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:59,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:59,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262868259] [2022-11-16 11:07:59,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262868259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:59,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302900312] [2022-11-16 11:07:59,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:07:59,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:59,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:59,418 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:59,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 11:08:00,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-16 11:08:00,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:00,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 11:08:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:01,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:08:02,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:08:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:03,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:03,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:08:03,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:08:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:03,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302900312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:03,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:03,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2022-11-16 11:08:03,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405179510] [2022-11-16 11:08:03,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:03,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-16 11:08:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:03,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-16 11:08:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=4584, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 11:08:03,495 INFO L87 Difference]: Start difference. First operand 191 states and 196 transitions. Second operand has 70 states, 70 states have (on average 3.6285714285714286) internal successors, (254), 70 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:07,240 INFO L93 Difference]: Finished difference Result 276 states and 280 transitions. [2022-11-16 11:08:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-16 11:08:07,240 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.6285714285714286) internal successors, (254), 70 states have internal predecessors, (254), 0 states have call successors, (0), 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 124 [2022-11-16 11:08:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:07,242 INFO L225 Difference]: With dead ends: 276 [2022-11-16 11:08:07,242 INFO L226 Difference]: Without dead ends: 274 [2022-11-16 11:08:07,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 209 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3958 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=626, Invalid=14380, Unknown=0, NotChecked=0, Total=15006 [2022-11-16 11:08:07,243 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 326 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 4439 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 4532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:07,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1555 Invalid, 4532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4439 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-16 11:08:07,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-16 11:08:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 199. [2022-11-16 11:08:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0303030303030303) internal successors, (204), 198 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 204 transitions. [2022-11-16 11:08:07,450 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 204 transitions. Word has length 124 [2022-11-16 11:08:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:07,450 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 204 transitions. [2022-11-16 11:08:07,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.6285714285714286) internal successors, (254), 70 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 204 transitions. [2022-11-16 11:08:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-16 11:08:07,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:07,452 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:07,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:07,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 11:08:07,665 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:07,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2125860351, now seen corresponding path program 36 times [2022-11-16 11:08:07,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:07,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601818802] [2022-11-16 11:08:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:07,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 12 proven. 906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:09,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601818802] [2022-11-16 11:08:09,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601818802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:09,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285201106] [2022-11-16 11:08:09,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:08:09,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:09,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:09,919 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:09,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 11:08:14,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-11-16 11:08:14,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:14,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-16 11:08:14,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:15,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:08:15,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-16 11:08:15,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-16 11:08:15,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-16 11:08:15,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-16 11:08:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:08:15,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 11:08:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:08:15,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:08:15,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:08:15,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 11:08:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:08:15,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:08:15,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:08:15,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:08:16,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:08:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 10 proven. 908 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:16,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:51,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-11-16 11:08:51,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-11-16 11:08:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 890 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:08:52,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285201106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:52,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:52,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 34] total 75 [2022-11-16 11:08:52,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822867363] [2022-11-16 11:08:52,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:52,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-16 11:08:52,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:52,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-16 11:08:52,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=5160, Unknown=7, NotChecked=0, Total=5550 [2022-11-16 11:08:52,187 INFO L87 Difference]: Start difference. First operand 199 states and 204 transitions. Second operand has 75 states, 75 states have (on average 3.506666666666667) internal successors, (263), 75 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) [2022-11-16 11:08:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:56,828 INFO L93 Difference]: Finished difference Result 281 states and 285 transitions. [2022-11-16 11:08:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-16 11:08:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.506666666666667) internal successors, (263), 75 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 128 [2022-11-16 11:08:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:56,830 INFO L225 Difference]: With dead ends: 281 [2022-11-16 11:08:56,830 INFO L226 Difference]: Without dead ends: 279 [2022-11-16 11:08:56,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 208 SyntacticMatches, 17 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4180 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=885, Invalid=12680, Unknown=7, NotChecked=0, Total=13572 [2022-11-16 11:08:56,831 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 177 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 5196 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 5425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 5196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:56,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1765 Invalid, 5425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 5196 Invalid, 0 Unknown, 121 Unchecked, 2.6s Time] [2022-11-16 11:08:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-16 11:08:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 141. [2022-11-16 11:08:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-11-16 11:08:56,924 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 128 [2022-11-16 11:08:56,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:56,924 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-11-16 11:08:56,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.506666666666667) internal successors, (263), 75 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) [2022-11-16 11:08:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-11-16 11:08:56,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-16 11:08:56,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:56,926 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:56,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:57,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 11:08:57,131 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:57,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:57,131 INFO L85 PathProgramCache]: Analyzing trace with hash -321118800, now seen corresponding path program 37 times [2022-11-16 11:08:57,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:57,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620048539] [2022-11-16 11:08:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:57,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:57,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:57,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620048539] [2022-11-16 11:08:57,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620048539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:57,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122990465] [2022-11-16 11:08:57,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:08:57,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:57,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:57,811 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:57,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 11:08:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:58,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:08:58,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:58,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:59,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122990465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:59,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:59,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 52 [2022-11-16 11:08:59,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333015374] [2022-11-16 11:08:59,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:59,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 11:08:59,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:59,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 11:08:59,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 11:08:59,336 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:00,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:00,156 INFO L93 Difference]: Finished difference Result 274 states and 277 transitions. [2022-11-16 11:09:00,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:09:00,157 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 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 128 [2022-11-16 11:09:00,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:00,158 INFO L225 Difference]: With dead ends: 274 [2022-11-16 11:09:00,158 INFO L226 Difference]: Without dead ends: 203 [2022-11-16 11:09:00,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 207 SyntacticMatches, 31 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1057, Invalid=3499, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 11:09:00,159 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 368 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:00,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 320 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:09:00,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-16 11:09:00,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 141. [2022-11-16 11:09:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2022-11-16 11:09:00,252 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 128 [2022-11-16 11:09:00,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:00,252 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2022-11-16 11:09:00,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:00,253 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2022-11-16 11:09:00,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-16 11:09:00,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:00,253 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:00,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:00,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-16 11:09:00,454 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1768629840, now seen corresponding path program 38 times [2022-11-16 11:09:00,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:00,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736690289] [2022-11-16 11:09:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:00,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:02,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:02,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736690289] [2022-11-16 11:09:02,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736690289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:02,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428895215] [2022-11-16 11:09:02,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:09:02,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:02,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:02,209 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:02,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 11:09:02,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:09:02,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-16 11:09:02,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:03,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:09:03,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-16 11:09:03,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-16 11:09:03,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:09:04,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:09:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:04,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:05,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-16 11:09:05,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 129 [2022-11-16 11:09:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:05,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428895215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:05,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:05,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 38] total 75 [2022-11-16 11:09:05,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417191144] [2022-11-16 11:09:05,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:05,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-16 11:09:05,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:05,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-16 11:09:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=5218, Unknown=0, NotChecked=0, Total=5550 [2022-11-16 11:09:05,646 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 75 states, 75 states have (on average 3.6266666666666665) internal successors, (272), 75 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) [2022-11-16 11:09:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:10,764 INFO L93 Difference]: Finished difference Result 360 states and 366 transitions. [2022-11-16 11:09:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-16 11:09:10,764 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.6266666666666665) internal successors, (272), 75 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 132 [2022-11-16 11:09:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:10,766 INFO L225 Difference]: With dead ends: 360 [2022-11-16 11:09:10,766 INFO L226 Difference]: Without dead ends: 358 [2022-11-16 11:09:10,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 236 SyntacticMatches, 13 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6596 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1016, Invalid=20154, Unknown=0, NotChecked=0, Total=21170 [2022-11-16 11:09:10,768 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 576 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 4483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:10,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1574 Invalid, 4483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4156 Invalid, 0 Unknown, 173 Unchecked, 1.9s Time] [2022-11-16 11:09:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-16 11:09:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 153. [2022-11-16 11:09:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0394736842105263) internal successors, (158), 152 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2022-11-16 11:09:10,879 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 132 [2022-11-16 11:09:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:10,879 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2022-11-16 11:09:10,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.6266666666666665) internal successors, (272), 75 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) [2022-11-16 11:09:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2022-11-16 11:09:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-16 11:09:10,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:10,880 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:10,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:11,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:11,081 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1893103253, now seen corresponding path program 39 times [2022-11-16 11:09:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:11,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327398819] [2022-11-16 11:09:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:11,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:12,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327398819] [2022-11-16 11:09:12,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327398819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741121510] [2022-11-16 11:09:12,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:09:12,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:12,416 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:12,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 11:09:15,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-16 11:09:15,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 11:09:15,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:16,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:09:18,745 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 11:09:18,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 11:09:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 435 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:18,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:21,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-16 11:09:21,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-16 11:09:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 420 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:22,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741121510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:22,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:22,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 90 [2022-11-16 11:09:22,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724153888] [2022-11-16 11:09:22,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:22,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-16 11:09:22,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-16 11:09:22,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=7141, Unknown=0, NotChecked=0, Total=8010 [2022-11-16 11:09:22,065 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 90 states, 90 states have (on average 3.6333333333333333) internal successors, (327), 90 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:25,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:25,938 INFO L93 Difference]: Finished difference Result 293 states and 299 transitions. [2022-11-16 11:09:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-16 11:09:25,939 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.6333333333333333) internal successors, (327), 90 states have internal predecessors, (327), 0 states have call successors, (0), 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 132 [2022-11-16 11:09:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:25,940 INFO L225 Difference]: With dead ends: 293 [2022-11-16 11:09:25,940 INFO L226 Difference]: Without dead ends: 222 [2022-11-16 11:09:25,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 226 SyntacticMatches, 16 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1597, Invalid=15959, Unknown=0, NotChecked=0, Total=17556 [2022-11-16 11:09:25,942 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 135 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 2777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:25,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1313 Invalid, 2777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2319 Invalid, 0 Unknown, 404 Unchecked, 1.1s Time] [2022-11-16 11:09:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-16 11:09:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 161. [2022-11-16 11:09:26,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.03125) internal successors, (165), 160 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-11-16 11:09:26,061 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 132 [2022-11-16 11:09:26,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:26,061 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-11-16 11:09:26,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.6333333333333333) internal successors, (327), 90 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-11-16 11:09:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 11:09:26,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:26,063 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:26,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:26,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-16 11:09:26,264 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash 516169825, now seen corresponding path program 40 times [2022-11-16 11:09:26,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:26,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638384851] [2022-11-16 11:09:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:26,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:27,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:27,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638384851] [2022-11-16 11:09:27,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638384851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:27,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928047312] [2022-11-16 11:09:27,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:09:27,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:27,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:27,877 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:27,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-16 11:09:31,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:09:31,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:31,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 11:09:31,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:31,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:09:31,711 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:09:31,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:09:31,726 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:09:31,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:09:31,794 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:09:31,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:09:32,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:09:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 3 proven. 1077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:32,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:33,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:09:33,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:09:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1079 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:09:33,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928047312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:33,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:33,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 40] total 60 [2022-11-16 11:09:33,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195924294] [2022-11-16 11:09:33,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:33,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 11:09:33,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:33,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 11:09:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=3336, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 11:09:33,564 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 60 states, 60 states have (on average 3.6) internal successors, (216), 60 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:37,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:37,400 INFO L93 Difference]: Finished difference Result 293 states and 297 transitions. [2022-11-16 11:09:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-16 11:09:37,400 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.6) internal successors, (216), 60 states have internal predecessors, (216), 0 states have call successors, (0), 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 140 [2022-11-16 11:09:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:37,402 INFO L225 Difference]: With dead ends: 293 [2022-11-16 11:09:37,402 INFO L226 Difference]: Without dead ends: 291 [2022-11-16 11:09:37,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 251 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=480, Invalid=9620, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 11:09:37,403 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 220 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 4816 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 4895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 4816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:37,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1558 Invalid, 4895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 4816 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 11:09:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-16 11:09:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 215. [2022-11-16 11:09:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.02803738317757) internal successors, (220), 214 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 220 transitions. [2022-11-16 11:09:37,599 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 220 transitions. Word has length 140 [2022-11-16 11:09:37,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:37,599 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 220 transitions. [2022-11-16 11:09:37,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.6) internal successors, (216), 60 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 220 transitions. [2022-11-16 11:09:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 11:09:37,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:37,601 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:37,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:37,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-16 11:09:37,801 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:37,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1505000092, now seen corresponding path program 41 times [2022-11-16 11:09:37,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:37,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667390562] [2022-11-16 11:09:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:37,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:39,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:39,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667390562] [2022-11-16 11:09:39,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667390562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:39,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100771599] [2022-11-16 11:09:39,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:09:39,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:39,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:39,860 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:39,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 11:09:41,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-11-16 11:09:41,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:41,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 11:09:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:42,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:09:43,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:09:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:43,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:44,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:09:44,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:09:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:45,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100771599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:45,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:45,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 94 [2022-11-16 11:09:45,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512609289] [2022-11-16 11:09:45,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:45,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-16 11:09:45,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-16 11:09:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=8450, Unknown=0, NotChecked=0, Total=8742 [2022-11-16 11:09:45,093 INFO L87 Difference]: Start difference. First operand 215 states and 220 transitions. Second operand has 94 states, 94 states have (on average 3.648936170212766) internal successors, (343), 94 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:52,789 INFO L93 Difference]: Finished difference Result 308 states and 312 transitions. [2022-11-16 11:09:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-16 11:09:52,790 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.648936170212766) internal successors, (343), 94 states have internal predecessors, (343), 0 states have call successors, (0), 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 140 [2022-11-16 11:09:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:52,791 INFO L225 Difference]: With dead ends: 308 [2022-11-16 11:09:52,791 INFO L226 Difference]: Without dead ends: 306 [2022-11-16 11:09:52,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6113 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=900, Invalid=27156, Unknown=0, NotChecked=0, Total=28056 [2022-11-16 11:09:52,793 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 378 mSDsluCounter, 2142 mSDsCounter, 0 mSdLazyCounter, 6524 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 6633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 6524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:52,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 2187 Invalid, 6633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 6524 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 11:09:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-16 11:09:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 223. [2022-11-16 11:09:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.027027027027027) internal successors, (228), 222 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 228 transitions. [2022-11-16 11:09:53,054 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 228 transitions. Word has length 140 [2022-11-16 11:09:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:53,054 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 228 transitions. [2022-11-16 11:09:53,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.648936170212766) internal successors, (343), 94 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 228 transitions. [2022-11-16 11:09:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-16 11:09:53,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:53,056 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:53,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:53,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:53,265 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:53,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1167451167, now seen corresponding path program 42 times [2022-11-16 11:09:53,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:53,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020695911] [2022-11-16 11:09:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:53,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 24 proven. 1148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:55,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:55,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020695911] [2022-11-16 11:09:55,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020695911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:55,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330726801] [2022-11-16 11:09:55,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:09:55,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:55,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:55,379 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:55,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-16 11:10:04,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-11-16 11:10:04,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:04,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-16 11:10:04,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:05,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:10:05,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:05,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:10:05,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:05,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:10:05,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:05,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:10:05,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:05,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:10:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:06,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:10:06,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:06,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:10:06,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:06,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:10:06,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:06,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:10:06,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:06,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:10:07,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:10:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 21 proven. 1151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:07,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:08,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:10:08,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:10:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 0 proven. 1144 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:10:08,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330726801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:08,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:10:08,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 38] total 81 [2022-11-16 11:10:08,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118307644] [2022-11-16 11:10:08,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:08,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-16 11:10:08,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:08,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-16 11:10:08,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=6135, Unknown=0, NotChecked=0, Total=6480 [2022-11-16 11:10:08,855 INFO L87 Difference]: Start difference. First operand 223 states and 228 transitions. Second operand has 81 states, 81 states have (on average 3.654320987654321) internal successors, (296), 81 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:13,229 INFO L93 Difference]: Finished difference Result 313 states and 317 transitions. [2022-11-16 11:10:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-16 11:10:13,230 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.654320987654321) internal successors, (296), 81 states have internal predecessors, (296), 0 states have call successors, (0), 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 144 [2022-11-16 11:10:13,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:13,231 INFO L225 Difference]: With dead ends: 313 [2022-11-16 11:10:13,231 INFO L226 Difference]: Without dead ends: 311 [2022-11-16 11:10:13,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 238 SyntacticMatches, 17 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5041 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=815, Invalid=15697, Unknown=0, NotChecked=0, Total=16512 [2022-11-16 11:10:13,232 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 370 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 5715 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 5820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 5715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:13,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1963 Invalid, 5820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 5715 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-16 11:10:13,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-16 11:10:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 157. [2022-11-16 11:10:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-11-16 11:10:13,345 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 144 [2022-11-16 11:10:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:13,345 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-11-16 11:10:13,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.654320987654321) internal successors, (296), 81 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-11-16 11:10:13,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-16 11:10:13,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:13,347 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:13,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:13,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-16 11:10:13,558 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:13,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:13,558 INFO L85 PathProgramCache]: Analyzing trace with hash 677505682, now seen corresponding path program 43 times [2022-11-16 11:10:13,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:13,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487780515] [2022-11-16 11:10:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:13,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 513 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:14,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:14,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487780515] [2022-11-16 11:10:14,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487780515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:14,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926218711] [2022-11-16 11:10:14,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:10:14,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:14,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:14,352 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:14,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-16 11:10:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:14,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 11:10:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:15,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:16,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926218711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:16,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:10:16,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2022-11-16 11:10:16,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550932129] [2022-11-16 11:10:16,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:16,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 11:10:16,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 11:10:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 11:10:16,216 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:17,214 INFO L93 Difference]: Finished difference Result 306 states and 309 transitions. [2022-11-16 11:10:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 11:10:17,215 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-11-16 11:10:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:17,216 INFO L225 Difference]: With dead ends: 306 [2022-11-16 11:10:17,216 INFO L226 Difference]: Without dead ends: 227 [2022-11-16 11:10:17,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 233 SyntacticMatches, 35 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1314, Invalid=4386, Unknown=0, NotChecked=0, Total=5700 [2022-11-16 11:10:17,217 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 311 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:17,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 280 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:10:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-16 11:10:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 157. [2022-11-16 11:10:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-11-16 11:10:17,332 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 144 [2022-11-16 11:10:17,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:17,332 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-11-16 11:10:17,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-11-16 11:10:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-16 11:10:17,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:17,333 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:17,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:17,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 11:10:17,534 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:17,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1109113746, now seen corresponding path program 44 times [2022-11-16 11:10:17,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:17,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042307936] [2022-11-16 11:10:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:17,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 0 proven. 1215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:19,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:19,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042307936] [2022-11-16 11:10:19,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042307936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:19,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293193761] [2022-11-16 11:10:19,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:10:19,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:19,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:19,215 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:19,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-16 11:10:19,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:10:19,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:19,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-16 11:10:19,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:20,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:10:20,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:20,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:10:20,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:20,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:10:20,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:10:22,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:10:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 0 proven. 1215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:22,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:23,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-16 11:10:23,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2022-11-16 11:10:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 0 proven. 1215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:23,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293193761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:23,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:10:23,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 42] total 83 [2022-11-16 11:10:23,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188463585] [2022-11-16 11:10:23,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:23,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-16 11:10:23,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:23,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-16 11:10:23,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=6437, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 11:10:23,324 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 83 states, 83 states have (on average 3.6626506024096384) internal successors, (304), 83 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:27,471 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2022-11-16 11:10:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-16 11:10:27,472 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.6626506024096384) internal successors, (304), 83 states have internal predecessors, (304), 0 states have call successors, (0), 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 148 [2022-11-16 11:10:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:27,473 INFO L225 Difference]: With dead ends: 245 [2022-11-16 11:10:27,473 INFO L226 Difference]: Without dead ends: 243 [2022-11-16 11:10:27,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 265 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=767, Invalid=14485, Unknown=0, NotChecked=0, Total=15252 [2022-11-16 11:10:27,475 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 422 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 6019 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 6184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 6019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:27,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1972 Invalid, 6184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 6019 Invalid, 0 Unknown, 43 Unchecked, 2.6s Time] [2022-11-16 11:10:27,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-16 11:10:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 149. [2022-11-16 11:10:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-11-16 11:10:27,597 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 148 [2022-11-16 11:10:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:27,597 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-11-16 11:10:27,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.6626506024096384) internal successors, (304), 83 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-11-16 11:10:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-16 11:10:27,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:27,598 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:27,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:27,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 11:10:27,807 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:27,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2089713741, now seen corresponding path program 45 times [2022-11-16 11:10:27,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:27,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292935073] [2022-11-16 11:10:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:27,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:29,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292935073] [2022-11-16 11:10:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292935073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910391833] [2022-11-16 11:10:29,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:10:29,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:29,393 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:29,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-16 11:10:34,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-16 11:10:34,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:34,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 11:10:34,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:35,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:10:38,214 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 11:10:38,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 11:10:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 561 proven. 647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:38,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:41,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-16 11:10:41,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-16 11:10:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 544 proven. 664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:42,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910391833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:42,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:10:42,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 100 [2022-11-16 11:10:42,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135386157] [2022-11-16 11:10:42,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:42,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-16 11:10:42,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:42,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-16 11:10:42,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=8836, Unknown=0, NotChecked=0, Total=9900 [2022-11-16 11:10:42,096 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 100 states, 100 states have (on average 3.67) internal successors, (367), 100 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:50,559 INFO L93 Difference]: Finished difference Result 322 states and 327 transitions. [2022-11-16 11:10:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-11-16 11:10:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.67) internal successors, (367), 100 states have internal predecessors, (367), 0 states have call successors, (0), 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 148 [2022-11-16 11:10:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:50,561 INFO L225 Difference]: With dead ends: 322 [2022-11-16 11:10:50,561 INFO L226 Difference]: Without dead ends: 240 [2022-11-16 11:10:50,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 240 SyntacticMatches, 18 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8161 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=3007, Invalid=34823, Unknown=0, NotChecked=0, Total=37830 [2022-11-16 11:10:50,564 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 326 mSDsluCounter, 2470 mSDsCounter, 0 mSdLazyCounter, 3986 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 2549 SdHoareTripleChecker+Invalid, 5266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1187 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:50,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 2549 Invalid, 5266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3986 Invalid, 0 Unknown, 1187 Unchecked, 1.9s Time] [2022-11-16 11:10:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-16 11:10:50,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 165. [2022-11-16 11:10:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2022-11-16 11:10:50,697 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 148 [2022-11-16 11:10:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:50,697 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2022-11-16 11:10:50,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.67) internal successors, (367), 100 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2022-11-16 11:10:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 11:10:50,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:50,699 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:50,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:50,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-16 11:10:50,907 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:50,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1552389309, now seen corresponding path program 46 times [2022-11-16 11:10:50,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:50,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286457867] [2022-11-16 11:10:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:50,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 1358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:52,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:52,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286457867] [2022-11-16 11:10:52,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286457867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:52,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427093549] [2022-11-16 11:10:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:10:52,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:52,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:52,891 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:52,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-16 11:10:57,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:10:57,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:57,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 11:10:57,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:58,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:10:58,151 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:10:58,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:10:58,170 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:10:58,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:10:58,241 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:10:58,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:10:59,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:10:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 3 proven. 1355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:59,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:00,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:11:00,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:11:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 1357 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:11:00,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427093549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:11:00,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:11:00,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 44] total 66 [2022-11-16 11:11:00,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106206235] [2022-11-16 11:11:00,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:11:00,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-16 11:11:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-16 11:11:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=4066, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 11:11:00,288 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 66 states, 66 states have (on average 3.6363636363636362) internal successors, (240), 66 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:04,532 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2022-11-16 11:11:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-16 11:11:04,533 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.6363636363636362) internal successors, (240), 66 states have internal predecessors, (240), 0 states have call successors, (0), 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 156 [2022-11-16 11:11:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:04,534 INFO L225 Difference]: With dead ends: 247 [2022-11-16 11:11:04,534 INFO L226 Difference]: Without dead ends: 245 [2022-11-16 11:11:04,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 281 SyntacticMatches, 10 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=516, Invalid=11474, Unknown=0, NotChecked=0, Total=11990 [2022-11-16 11:11:04,535 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 258 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 5359 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 5449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 5359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:04,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1755 Invalid, 5449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 5359 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-16 11:11:04,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-16 11:11:04,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 157. [2022-11-16 11:11:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-11-16 11:11:04,763 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 156 [2022-11-16 11:11:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:04,763 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-11-16 11:11:04,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.6363636363636362) internal successors, (240), 66 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:04,764 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-11-16 11:11:04,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 11:11:04,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:04,765 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:04,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-16 11:11:04,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-16 11:11:04,977 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:04,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:04,977 INFO L85 PathProgramCache]: Analyzing trace with hash 691296894, now seen corresponding path program 47 times [2022-11-16 11:11:04,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:04,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406233053] [2022-11-16 11:11:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:04,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 1351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:06,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406233053] [2022-11-16 11:11:06,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406233053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43831184] [2022-11-16 11:11:06,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:11:06,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:06,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:06,634 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:06,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-16 11:11:09,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-16 11:11:09,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:11:09,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-16 11:11:09,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:10,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:11:12,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:11:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 1351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:12,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:12,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:11:12,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:11:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 1351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:13,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43831184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:11:13,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:11:13,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 86 [2022-11-16 11:11:13,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943192195] [2022-11-16 11:11:13,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:11:13,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-16 11:11:13,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:13,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-16 11:11:13,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=7008, Unknown=0, NotChecked=0, Total=7310 [2022-11-16 11:11:13,183 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 86 states, 86 states have (on average 3.697674418604651) internal successors, (318), 86 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:18,713 INFO L93 Difference]: Finished difference Result 264 states and 267 transitions. [2022-11-16 11:11:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-16 11:11:18,713 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.697674418604651) internal successors, (318), 86 states have internal predecessors, (318), 0 states have call successors, (0), 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 156 [2022-11-16 11:11:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:18,715 INFO L225 Difference]: With dead ends: 264 [2022-11-16 11:11:18,715 INFO L226 Difference]: Without dead ends: 262 [2022-11-16 11:11:18,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 265 SyntacticMatches, 4 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5834 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=758, Invalid=21592, Unknown=0, NotChecked=0, Total=22350 [2022-11-16 11:11:18,717 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 321 mSDsluCounter, 2347 mSDsCounter, 0 mSdLazyCounter, 7379 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 7489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 7379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:18,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 2394 Invalid, 7489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 7379 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 11:11:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-16 11:11:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 173. [2022-11-16 11:11:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2022-11-16 11:11:18,888 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 156 [2022-11-16 11:11:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:18,888 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2022-11-16 11:11:18,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.697674418604651) internal successors, (318), 86 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2022-11-16 11:11:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-16 11:11:18,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:18,890 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:18,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:19,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:19,091 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:19,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:19,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1934297460, now seen corresponding path program 48 times [2022-11-16 11:11:19,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:19,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130236811] [2022-11-16 11:11:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:19,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 649 proven. 776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:20,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:20,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130236811] [2022-11-16 11:11:20,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130236811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:20,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385452465] [2022-11-16 11:11:20,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:11:20,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:20,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:20,028 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:20,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-16 11:11:24,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-11-16 11:11:24,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:11:24,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 11:11:24,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:25,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:26,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385452465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:11:26,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:11:26,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 64 [2022-11-16 11:11:26,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827500940] [2022-11-16 11:11:26,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:11:26,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 11:11:26,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 11:11:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=3084, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 11:11:26,139 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:27,303 INFO L93 Difference]: Finished difference Result 338 states and 341 transitions. [2022-11-16 11:11:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 11:11:27,303 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 0 states have call successors, (0), 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 160 [2022-11-16 11:11:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:27,304 INFO L225 Difference]: With dead ends: 338 [2022-11-16 11:11:27,304 INFO L226 Difference]: Without dead ends: 251 [2022-11-16 11:11:27,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 259 SyntacticMatches, 39 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3265 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1599, Invalid=5373, Unknown=0, NotChecked=0, Total=6972 [2022-11-16 11:11:27,305 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 457 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:27,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 350 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:11:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-16 11:11:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 173. [2022-11-16 11:11:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2022-11-16 11:11:27,473 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 160 [2022-11-16 11:11:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:27,473 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2022-11-16 11:11:27,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2022-11-16 11:11:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-16 11:11:27,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:27,475 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:27,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:27,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:27,675 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1582755700, now seen corresponding path program 49 times [2022-11-16 11:11:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:27,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947691467] [2022-11-16 11:11:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:27,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1509 backedges. 0 proven. 1509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:29,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:29,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947691467] [2022-11-16 11:11:29,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947691467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:29,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886187083] [2022-11-16 11:11:29,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:11:29,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:29,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:29,676 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:29,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-16 11:11:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:30,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-16 11:11:30,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:31,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:11:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:11:31,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:11:31,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:11:31,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:11:31,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:11:33,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:11:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1509 backedges. 0 proven. 1509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:33,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:34,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-16 11:11:34,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 129 [2022-11-16 11:11:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1509 backedges. 0 proven. 1509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:34,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886187083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:11:34,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:11:34,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 46] total 91 [2022-11-16 11:11:34,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959506812] [2022-11-16 11:11:34,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:11:34,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-16 11:11:34,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:34,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-16 11:11:34,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=7786, Unknown=0, NotChecked=0, Total=8190 [2022-11-16 11:11:34,311 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 91 states, 91 states have (on average 3.6923076923076925) internal successors, (336), 91 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:42,044 INFO L93 Difference]: Finished difference Result 454 states and 460 transitions. [2022-11-16 11:11:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-11-16 11:11:42,044 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.6923076923076925) internal successors, (336), 91 states have internal predecessors, (336), 0 states have call successors, (0), 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 164 [2022-11-16 11:11:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:42,046 INFO L225 Difference]: With dead ends: 454 [2022-11-16 11:11:42,046 INFO L226 Difference]: Without dead ends: 452 [2022-11-16 11:11:42,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 296 SyntacticMatches, 7 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11848 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1328, Invalid=37284, Unknown=0, NotChecked=0, Total=38612 [2022-11-16 11:11:42,048 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 732 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 7428 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 2864 SdHoareTripleChecker+Invalid, 7873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 7428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:42,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 2864 Invalid, 7873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 7428 Invalid, 0 Unknown, 243 Unchecked, 3.3s Time] [2022-11-16 11:11:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-11-16 11:11:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 185. [2022-11-16 11:11:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0326086956521738) internal successors, (190), 184 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 190 transitions. [2022-11-16 11:11:42,205 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 190 transitions. Word has length 164 [2022-11-16 11:11:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:42,206 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 190 transitions. [2022-11-16 11:11:42,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.6923076923076925) internal successors, (336), 91 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 190 transitions. [2022-11-16 11:11:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-16 11:11:42,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:42,207 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:42,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:42,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:42,407 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1178416849, now seen corresponding path program 50 times [2022-11-16 11:11:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:42,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092047108] [2022-11-16 11:11:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:44,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:44,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092047108] [2022-11-16 11:11:44,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092047108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:44,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602502739] [2022-11-16 11:11:44,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:11:44,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:44,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:44,201 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:44,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-16 11:11:44,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:11:44,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:11:44,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-16 11:11:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:45,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:11:47,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:11:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:47,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:48,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:11:48,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:11:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:48,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602502739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:11:48,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:11:48,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-11-16 11:11:48,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308650135] [2022-11-16 11:11:48,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:11:48,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-16 11:11:48,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:48,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-16 11:11:48,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=7354, Unknown=0, NotChecked=0, Total=7656 [2022-11-16 11:11:48,334 INFO L87 Difference]: Start difference. First operand 185 states and 190 transitions. Second operand has 88 states, 88 states have (on average 3.772727272727273) internal successors, (332), 88 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:54,348 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2022-11-16 11:11:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-11-16 11:11:54,349 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.772727272727273) internal successors, (332), 88 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-11-16 11:11:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:54,351 INFO L225 Difference]: With dead ends: 364 [2022-11-16 11:11:54,351 INFO L226 Difference]: Without dead ends: 362 [2022-11-16 11:11:54,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 281 SyntacticMatches, 4 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5900 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=742, Invalid=22210, Unknown=0, NotChecked=0, Total=22952 [2022-11-16 11:11:54,352 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 422 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 7889 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 2754 SdHoareTripleChecker+Invalid, 8003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 7889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:54,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 2754 Invalid, 8003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 7889 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 11:11:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-16 11:11:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 193. [2022-11-16 11:11:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.03125) internal successors, (198), 192 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 198 transitions. [2022-11-16 11:11:54,522 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 198 transitions. Word has length 164 [2022-11-16 11:11:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:54,522 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 198 transitions. [2022-11-16 11:11:54,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.772727272727273) internal successors, (332), 88 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 198 transitions. [2022-11-16 11:11:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-16 11:11:54,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:54,524 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:54,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:54,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:54,730 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:54,730 INFO L85 PathProgramCache]: Analyzing trace with hash 615561125, now seen corresponding path program 51 times [2022-11-16 11:11:54,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:54,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627755422] [2022-11-16 11:11:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:54,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 723 proven. 857 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:55,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627755422] [2022-11-16 11:11:55,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627755422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:55,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093975378] [2022-11-16 11:11:55,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:11:55,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:55,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:55,743 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:55,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-16 11:12:03,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-11-16 11:12:03,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 11:12:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 800 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:04,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 800 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:05,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093975378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:05,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:05,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 67 [2022-11-16 11:12:05,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945839339] [2022-11-16 11:12:05,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:05,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-16 11:12:05,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:05,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-16 11:12:05,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=3385, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 11:12:05,320 INFO L87 Difference]: Start difference. First operand 193 states and 198 transitions. Second operand has 67 states, 67 states have (on average 3.8805970149253732) internal successors, (260), 67 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) [2022-11-16 11:12:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:06,810 INFO L93 Difference]: Finished difference Result 442 states and 447 transitions. [2022-11-16 11:12:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 11:12:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.8805970149253732) internal successors, (260), 67 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 168 [2022-11-16 11:12:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:06,811 INFO L225 Difference]: With dead ends: 442 [2022-11-16 11:12:06,811 INFO L226 Difference]: Without dead ends: 351 [2022-11-16 11:12:06,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 272 SyntacticMatches, 41 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3587 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1752, Invalid=5904, Unknown=0, NotChecked=0, Total=7656 [2022-11-16 11:12:06,812 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 622 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:06,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 452 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:12:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-16 11:12:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 193. [2022-11-16 11:12:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 197 transitions. [2022-11-16 11:12:07,000 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 197 transitions. Word has length 168 [2022-11-16 11:12:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:07,000 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 197 transitions. [2022-11-16 11:12:07,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.8805970149253732) internal successors, (260), 67 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) [2022-11-16 11:12:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 197 transitions. [2022-11-16 11:12:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-16 11:12:07,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:07,001 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:07,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:07,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:07,202 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:07,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1227618267, now seen corresponding path program 52 times [2022-11-16 11:12:07,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:07,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822278873] [2022-11-16 11:12:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:07,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1668 backedges. 0 proven. 1668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:09,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:09,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822278873] [2022-11-16 11:12:09,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822278873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:09,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722853611] [2022-11-16 11:12:09,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:12:09,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:09,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:09,375 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:09,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-16 11:12:16,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:12:16,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:16,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-16 11:12:16,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:16,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:12:16,459 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:12:16,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:12:16,474 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:12:16,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:12:16,549 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:12:16,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:12:17,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:12:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1668 backedges. 3 proven. 1665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:17,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:18,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:12:18,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:12:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1668 backedges. 0 proven. 1667 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:12:18,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722853611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:18,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:18,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 48] total 72 [2022-11-16 11:12:18,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079033277] [2022-11-16 11:12:18,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:18,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-16 11:12:18,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-16 11:12:18,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=4868, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 11:12:18,859 INFO L87 Difference]: Start difference. First operand 193 states and 197 transitions. Second operand has 72 states, 72 states have (on average 3.6666666666666665) internal successors, (264), 72 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:24,117 INFO L93 Difference]: Finished difference Result 357 states and 361 transitions. [2022-11-16 11:12:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-16 11:12:24,118 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.6666666666666665) internal successors, (264), 72 states have internal predecessors, (264), 0 states have call successors, (0), 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 172 [2022-11-16 11:12:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:24,119 INFO L225 Difference]: With dead ends: 357 [2022-11-16 11:12:24,119 INFO L226 Difference]: Without dead ends: 355 [2022-11-16 11:12:24,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 311 SyntacticMatches, 10 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=568, Invalid=13952, Unknown=0, NotChecked=0, Total=14520 [2022-11-16 11:12:24,120 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 287 mSDsluCounter, 2301 mSDsCounter, 0 mSdLazyCounter, 6588 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 6687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 6588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:24,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 2353 Invalid, 6687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 6588 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 11:12:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-16 11:12:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 263. [2022-11-16 11:12:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0229007633587786) internal successors, (268), 262 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 268 transitions. [2022-11-16 11:12:24,444 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 268 transitions. Word has length 172 [2022-11-16 11:12:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:24,444 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 268 transitions. [2022-11-16 11:12:24,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.6666666666666665) internal successors, (264), 72 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 268 transitions. [2022-11-16 11:12:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-16 11:12:24,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:24,446 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:24,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:24,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-16 11:12:24,658 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1626770528, now seen corresponding path program 53 times [2022-11-16 11:12:24,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:24,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725968846] [2022-11-16 11:12:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:24,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:26,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:26,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725968846] [2022-11-16 11:12:26,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725968846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:26,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407774814] [2022-11-16 11:12:26,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:12:26,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:26,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:26,754 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:26,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-16 11:12:32,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-11-16 11:12:32,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-16 11:12:32,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:33,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:12:35,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:12:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:35,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:36,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:12:36,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:12:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:36,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407774814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:36,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:36,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2022-11-16 11:12:36,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157904179] [2022-11-16 11:12:36,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:36,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-16 11:12:36,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:36,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-16 11:12:36,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=8413, Unknown=0, NotChecked=0, Total=8742 [2022-11-16 11:12:36,277 INFO L87 Difference]: Start difference. First operand 263 states and 268 transitions. Second operand has 94 states, 94 states have (on average 3.723404255319149) internal successors, (350), 94 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:43,050 INFO L93 Difference]: Finished difference Result 372 states and 376 transitions. [2022-11-16 11:12:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-16 11:12:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.723404255319149) internal successors, (350), 94 states have internal predecessors, (350), 0 states have call successors, (0), 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 172 [2022-11-16 11:12:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:43,052 INFO L225 Difference]: With dead ends: 372 [2022-11-16 11:12:43,052 INFO L226 Difference]: Without dead ends: 370 [2022-11-16 11:12:43,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 294 SyntacticMatches, 3 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6923 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=810, Invalid=25922, Unknown=0, NotChecked=0, Total=26732 [2022-11-16 11:12:43,055 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 448 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 8461 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 8585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 8461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:43,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 2918 Invalid, 8585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 8461 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-16 11:12:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-16 11:12:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 271. [2022-11-16 11:12:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0222222222222221) internal successors, (276), 270 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 276 transitions. [2022-11-16 11:12:43,409 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 276 transitions. Word has length 172 [2022-11-16 11:12:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:43,409 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 276 transitions. [2022-11-16 11:12:43,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.723404255319149) internal successors, (350), 94 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 276 transitions. [2022-11-16 11:12:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-16 11:12:43,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:43,411 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 23, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:43,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:43,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-16 11:12:43,626 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:43,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:43,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1561383515, now seen corresponding path program 54 times [2022-11-16 11:12:43,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:43,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645702667] [2022-11-16 11:12:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 24 proven. 1752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:46,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:46,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645702667] [2022-11-16 11:12:46,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645702667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:46,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222967510] [2022-11-16 11:12:46,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:12:46,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:46,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:46,839 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:46,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-16 11:13:06,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-11-16 11:13:06,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:13:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-16 11:13:06,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:06,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:13:06,696 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:13:06,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:13:06,710 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:13:06,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:13:06,731 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:13:06,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:13:06,746 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:13:06,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:13:06,769 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:13:06,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:13:06,784 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:13:06,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:13:06,806 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:13:06,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:13:06,819 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:13:06,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:13:06,895 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:13:06,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:13:08,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:13:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 36 proven. 1740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:08,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:09,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:13:09,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:13:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:13:09,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222967510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:09,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:09,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 46] total 72 [2022-11-16 11:13:09,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095242961] [2022-11-16 11:13:09,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:09,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-16 11:13:09,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:09,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-16 11:13:09,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=4854, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 11:13:09,525 INFO L87 Difference]: Start difference. First operand 271 states and 276 transitions. Second operand has 72 states, 72 states have (on average 3.6666666666666665) internal successors, (264), 72 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:15,445 INFO L93 Difference]: Finished difference Result 377 states and 381 transitions. [2022-11-16 11:13:15,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-16 11:13:15,445 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.6666666666666665) internal successors, (264), 72 states have internal predecessors, (264), 0 states have call successors, (0), 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 176 [2022-11-16 11:13:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:15,447 INFO L225 Difference]: With dead ends: 377 [2022-11-16 11:13:15,447 INFO L226 Difference]: Without dead ends: 375 [2022-11-16 11:13:15,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 317 SyntacticMatches, 19 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=678, Invalid=15324, Unknown=0, NotChecked=0, Total=16002 [2022-11-16 11:13:15,448 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 199 mSDsluCounter, 2364 mSDsCounter, 0 mSdLazyCounter, 7650 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 2422 SdHoareTripleChecker+Invalid, 7743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 7650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:15,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 2422 Invalid, 7743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 7650 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-16 11:13:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-16 11:13:15,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 189. [2022-11-16 11:13:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2022-11-16 11:13:15,686 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 176 [2022-11-16 11:13:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:15,687 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2022-11-16 11:13:15,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.6666666666666665) internal successors, (264), 72 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2022-11-16 11:13:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-16 11:13:15,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:15,688 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:15,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:15,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:15,888 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1191347626, now seen corresponding path program 55 times [2022-11-16 11:13:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:15,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401000446] [2022-11-16 11:13:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:15,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 801 proven. 942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:16,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:16,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401000446] [2022-11-16 11:13:16,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401000446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:16,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957051590] [2022-11-16 11:13:16,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:13:16,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:16,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:16,988 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:16,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-16 11:13:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:17,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 11:13:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 882 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:18,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 882 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:19,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957051590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:19,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:19,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 70 [2022-11-16 11:13:19,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907239837] [2022-11-16 11:13:19,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:19,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-16 11:13:19,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-16 11:13:19,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=3700, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 11:13:19,455 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 70 states, 70 states have (on average 3.8857142857142857) internal successors, (272), 70 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) [2022-11-16 11:13:20,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:20,846 INFO L93 Difference]: Finished difference Result 370 states and 373 transitions. [2022-11-16 11:13:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:13:20,846 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.8857142857142857) internal successors, (272), 70 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 176 [2022-11-16 11:13:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:20,847 INFO L225 Difference]: With dead ends: 370 [2022-11-16 11:13:20,847 INFO L226 Difference]: Without dead ends: 275 [2022-11-16 11:13:20,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 285 SyntacticMatches, 43 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3924 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1912, Invalid=6460, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 11:13:20,848 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 524 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:20,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 395 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:13:20,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-16 11:13:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 189. [2022-11-16 11:13:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2022-11-16 11:13:21,038 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 176 [2022-11-16 11:13:21,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:21,038 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2022-11-16 11:13:21,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.8857142857142857) internal successors, (272), 70 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) [2022-11-16 11:13:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2022-11-16 11:13:21,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-16 11:13:21,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:21,040 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:21,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-16 11:13:21,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:21,246 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:21,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:21,247 INFO L85 PathProgramCache]: Analyzing trace with hash -911444650, now seen corresponding path program 56 times [2022-11-16 11:13:21,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:21,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038692258] [2022-11-16 11:13:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:21,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1835 backedges. 0 proven. 1835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:23,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:23,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038692258] [2022-11-16 11:13:23,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038692258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:23,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294097348] [2022-11-16 11:13:23,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:13:23,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:23,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:23,777 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:23,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-16 11:13:24,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:13:24,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:13:24,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-16 11:13:24,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:25,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:13:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:13:25,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:13:25,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:13:25,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:13:25,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:13:27,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:13:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1835 backedges. 0 proven. 1835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:28,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:29,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-16 11:13:29,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 129 [2022-11-16 11:13:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1835 backedges. 0 proven. 1835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:29,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294097348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:29,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:29,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 50] total 99 [2022-11-16 11:13:29,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163989558] [2022-11-16 11:13:29,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:29,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-16 11:13:29,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:29,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-16 11:13:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=9261, Unknown=0, NotChecked=0, Total=9702 [2022-11-16 11:13:29,264 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 99 states, 99 states have (on average 3.717171717171717) internal successors, (368), 99 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:35,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:35,153 INFO L93 Difference]: Finished difference Result 295 states and 298 transitions. [2022-11-16 11:13:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-16 11:13:35,154 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.717171717171717) internal successors, (368), 99 states have internal predecessors, (368), 0 states have call successors, (0), 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 180 [2022-11-16 11:13:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:35,155 INFO L225 Difference]: With dead ends: 295 [2022-11-16 11:13:35,155 INFO L226 Difference]: Without dead ends: 293 [2022-11-16 11:13:35,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 325 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5390 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=924, Invalid=21128, Unknown=0, NotChecked=0, Total=22052 [2022-11-16 11:13:35,156 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 582 mSDsluCounter, 2754 mSDsCounter, 0 mSdLazyCounter, 8391 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 2807 SdHoareTripleChecker+Invalid, 8591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 8391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:35,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 2807 Invalid, 8591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 8391 Invalid, 0 Unknown, 47 Unchecked, 3.6s Time] [2022-11-16 11:13:35,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-16 11:13:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 181. [2022-11-16 11:13:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-11-16 11:13:35,374 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 180 [2022-11-16 11:13:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:35,374 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-11-16 11:13:35,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.717171717171717) internal successors, (368), 99 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-11-16 11:13:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-16 11:13:35,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:35,376 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:35,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:35,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:35,584 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:35,585 INFO L85 PathProgramCache]: Analyzing trace with hash -634625007, now seen corresponding path program 57 times [2022-11-16 11:13:35,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:35,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258651015] [2022-11-16 11:13:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:35,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:37,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:37,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258651015] [2022-11-16 11:13:37,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258651015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:37,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965090270] [2022-11-16 11:13:37,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:13:37,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:37,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:37,714 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:37,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-16 11:13:49,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-16 11:13:49,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:13:49,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 11:13:49,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:50,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:13:55,150 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 11:13:55,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 11:13:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 861 proven. 967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:55,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:59,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-16 11:13:59,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-16 11:14:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 840 proven. 988 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:00,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965090270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:00,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:14:00,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 120 [2022-11-16 11:14:00,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167737091] [2022-11-16 11:14:00,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:00,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-11-16 11:14:00,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:00,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-11-16 11:14:00,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=12766, Unknown=0, NotChecked=0, Total=14280 [2022-11-16 11:14:00,799 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 120 states, 120 states have (on average 3.725) internal successors, (447), 120 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:07,488 INFO L93 Difference]: Finished difference Result 374 states and 378 transitions. [2022-11-16 11:14:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-16 11:14:07,489 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 3.725) internal successors, (447), 120 states have internal predecessors, (447), 0 states have call successors, (0), 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 180 [2022-11-16 11:14:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:07,490 INFO L225 Difference]: With dead ends: 374 [2022-11-16 11:14:07,490 INFO L226 Difference]: Without dead ends: 279 [2022-11-16 11:14:07,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 309 SyntacticMatches, 22 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5831 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=2701, Invalid=28805, Unknown=0, NotChecked=0, Total=31506 [2022-11-16 11:14:07,492 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 118 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 3838 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 4244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:07,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 2062 Invalid, 4244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3838 Invalid, 0 Unknown, 367 Unchecked, 1.8s Time] [2022-11-16 11:14:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-16 11:14:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 197. [2022-11-16 11:14:07,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2022-11-16 11:14:07,732 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 180 [2022-11-16 11:14:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:07,732 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2022-11-16 11:14:07,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 3.725) internal successors, (447), 120 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2022-11-16 11:14:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-16 11:14:07,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:07,733 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 23, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:07,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:07,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:07,933 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:14:07,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:07,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1010628359, now seen corresponding path program 58 times [2022-11-16 11:14:07,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:07,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598422928] [2022-11-16 11:14:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:07,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2010 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:10,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:10,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598422928] [2022-11-16 11:14:10,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598422928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:10,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466201140] [2022-11-16 11:14:10,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:14:10,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:10,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:10,422 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:10,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-16 11:14:23,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:14:23,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:14:23,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-16 11:14:23,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:23,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:14:23,755 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:14:23,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:14:23,771 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:14:23,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:14:23,851 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:14:23,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:14:25,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:14:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2010 backedges. 3 proven. 2007 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:25,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:26,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:14:26,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:14:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2010 backedges. 0 proven. 2009 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:14:26,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466201140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:26,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:14:26,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 52] total 78 [2022-11-16 11:14:26,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265922237] [2022-11-16 11:14:26,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:26,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-16 11:14:26,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:26,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-16 11:14:26,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5742, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 11:14:26,503 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 78 states, 78 states have (on average 3.6923076923076925) internal successors, (288), 78 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:32,320 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2022-11-16 11:14:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-16 11:14:32,321 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.6923076923076925) internal successors, (288), 78 states have internal predecessors, (288), 0 states have call successors, (0), 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 188 [2022-11-16 11:14:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:32,322 INFO L225 Difference]: With dead ends: 295 [2022-11-16 11:14:32,322 INFO L226 Difference]: Without dead ends: 293 [2022-11-16 11:14:32,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 341 SyntacticMatches, 10 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=604, Invalid=16166, Unknown=0, NotChecked=0, Total=16770 [2022-11-16 11:14:32,323 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 304 mSDsluCounter, 2383 mSDsCounter, 0 mSdLazyCounter, 7418 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 7523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 7418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:32,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 2437 Invalid, 7523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 7418 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 11:14:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-16 11:14:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 189. [2022-11-16 11:14:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-11-16 11:14:32,550 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 188 [2022-11-16 11:14:32,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:32,550 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-11-16 11:14:32,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.6923076923076925) internal successors, (288), 78 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-11-16 11:14:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-16 11:14:32,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:32,551 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:32,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:32,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:32,767 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:14:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash 425791554, now seen corresponding path program 59 times [2022-11-16 11:14:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:32,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928227158] [2022-11-16 11:14:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:32,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 2003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:35,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:35,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928227158] [2022-11-16 11:14:35,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928227158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:35,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245887631] [2022-11-16 11:14:35,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:14:35,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:35,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:35,395 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:35,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-16 11:14:42,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-16 11:14:42,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:14:42,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-16 11:14:42,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:43,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:14:46,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:14:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 2003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:46,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:46,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:14:46,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:14:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 2003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:47,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245887631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:47,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:14:47,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 102 [2022-11-16 11:14:47,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371789558] [2022-11-16 11:14:47,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:47,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-16 11:14:47,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-16 11:14:47,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=9945, Unknown=0, NotChecked=0, Total=10302 [2022-11-16 11:14:47,205 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 102 states, 102 states have (on average 3.7450980392156863) internal successors, (382), 102 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:54,949 INFO L93 Difference]: Finished difference Result 312 states and 315 transitions. [2022-11-16 11:14:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-11-16 11:14:54,950 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.7450980392156863) internal successors, (382), 102 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-11-16 11:14:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:54,951 INFO L225 Difference]: With dead ends: 312 [2022-11-16 11:14:54,951 INFO L226 Difference]: Without dead ends: 310 [2022-11-16 11:14:54,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 321 SyntacticMatches, 4 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8318 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=901, Invalid=30961, Unknown=0, NotChecked=0, Total=31862 [2022-11-16 11:14:54,954 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 379 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 10165 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 3263 SdHoareTripleChecker+Invalid, 10299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 10165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:54,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 3263 Invalid, 10299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 10165 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 11:14:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-16 11:14:55,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 205. [2022-11-16 11:14:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-11-16 11:14:55,344 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 188 [2022-11-16 11:14:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:55,344 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-11-16 11:14:55,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.7450980392156863) internal successors, (382), 102 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:55,345 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-11-16 11:14:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-16 11:14:55,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:55,345 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:55,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:55,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-11-16 11:14:55,547 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:14:55,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:55,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1860123960, now seen corresponding path program 60 times [2022-11-16 11:14:55,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:55,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360748424] [2022-11-16 11:14:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:55,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 969 proven. 1124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:56,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:56,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360748424] [2022-11-16 11:14:56,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360748424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:56,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503826959] [2022-11-16 11:14:56,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:14:56,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:56,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:56,874 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:56,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-16 11:15:34,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-11-16 11:15:34,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 11:15:34,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 1058 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:35,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 1058 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:36,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503826959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:36,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:36,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 76 [2022-11-16 11:15:36,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178026731] [2022-11-16 11:15:36,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:36,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-16 11:15:36,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-16 11:15:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=4372, Unknown=0, NotChecked=0, Total=5700 [2022-11-16 11:15:36,494 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 76 states, 76 states have (on average 3.8947368421052633) internal successors, (296), 76 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:38,198 INFO L93 Difference]: Finished difference Result 402 states and 405 transitions. [2022-11-16 11:15:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-16 11:15:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.8947368421052633) internal successors, (296), 76 states have internal predecessors, (296), 0 states have call successors, (0), 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 192 [2022-11-16 11:15:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:38,200 INFO L225 Difference]: With dead ends: 402 [2022-11-16 11:15:38,201 INFO L226 Difference]: Without dead ends: 299 [2022-11-16 11:15:38,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 311 SyntacticMatches, 47 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2253, Invalid=7647, Unknown=0, NotChecked=0, Total=9900 [2022-11-16 11:15:38,202 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 526 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:38,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 389 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:15:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-16 11:15:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 205. [2022-11-16 11:15:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2022-11-16 11:15:38,482 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 192 [2022-11-16 11:15:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:38,482 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2022-11-16 11:15:38,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.8947368421052633) internal successors, (296), 76 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2022-11-16 11:15:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-16 11:15:38,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:38,484 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 24, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:38,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:38,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-11-16 11:15:38,687 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:15:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:38,688 INFO L85 PathProgramCache]: Analyzing trace with hash -327004872, now seen corresponding path program 61 times [2022-11-16 11:15:38,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:38,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861321150] [2022-11-16 11:15:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:38,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 2193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:41,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:41,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861321150] [2022-11-16 11:15:41,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861321150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:41,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729632060] [2022-11-16 11:15:41,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:15:41,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:41,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:41,558 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:41,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-16 11:15:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:42,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-16 11:15:42,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:43,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:15:43,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:43,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:15:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:43,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:15:43,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:15:46,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:15:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 2193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:46,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:47,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-16 11:15:47,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 129 [2022-11-16 11:15:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 2193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:47,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729632060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:47,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:47,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 54] total 107 [2022-11-16 11:15:47,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956373370] [2022-11-16 11:15:47,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:47,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-16 11:15:47,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-16 11:15:47,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=10866, Unknown=0, NotChecked=0, Total=11342 [2022-11-16 11:15:47,589 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 107 states, 107 states have (on average 3.7383177570093458) internal successors, (400), 107 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:54,842 INFO L93 Difference]: Finished difference Result 319 states and 322 transitions. [2022-11-16 11:15:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-16 11:15:54,843 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.7383177570093458) internal successors, (400), 107 states have internal predecessors, (400), 0 states have call successors, (0), 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 196 [2022-11-16 11:15:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:54,844 INFO L225 Difference]: With dead ends: 319 [2022-11-16 11:15:54,844 INFO L226 Difference]: Without dead ends: 317 [2022-11-16 11:15:54,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 356 SyntacticMatches, 6 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6353 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1004, Invalid=25078, Unknown=0, NotChecked=0, Total=26082 [2022-11-16 11:15:54,846 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 594 mSDsluCounter, 3822 mSDsCounter, 0 mSdLazyCounter, 10885 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 3879 SdHoareTripleChecker+Invalid, 11105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 10885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:54,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 3879 Invalid, 11105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 10885 Invalid, 0 Unknown, 56 Unchecked, 4.5s Time] [2022-11-16 11:15:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-16 11:15:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 197. [2022-11-16 11:15:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-11-16 11:15:55,158 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 196 [2022-11-16 11:15:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:55,158 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-11-16 11:15:55,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.7383177570093458) internal successors, (400), 107 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-11-16 11:15:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-16 11:15:55,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:55,160 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:55,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:55,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:55,367 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:15:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:55,367 INFO L85 PathProgramCache]: Analyzing trace with hash -80654093, now seen corresponding path program 62 times [2022-11-16 11:15:55,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:55,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941334577] [2022-11-16 11:15:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:55,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 0 proven. 2186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:58,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:58,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941334577] [2022-11-16 11:15:58,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941334577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:58,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429710626] [2022-11-16 11:15:58,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:15:58,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:58,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:58,203 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:58,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-16 11:15:58,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:15:58,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:58,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-16 11:15:58,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:00,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:16:02,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:16:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 0 proven. 2186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:02,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:03,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:16:03,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:16:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 0 proven. 2186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:03,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429710626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:03,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:16:03,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-11-16 11:16:03,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045658953] [2022-11-16 11:16:03,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:03,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-16 11:16:03,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-16 11:16:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=10353, Unknown=0, NotChecked=0, Total=10712 [2022-11-16 11:16:03,550 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 104 states, 104 states have (on average 3.8076923076923075) internal successors, (396), 104 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:11,474 INFO L93 Difference]: Finished difference Result 324 states and 327 transitions. [2022-11-16 11:16:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-16 11:16:11,474 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.8076923076923075) internal successors, (396), 104 states have internal predecessors, (396), 0 states have call successors, (0), 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 196 [2022-11-16 11:16:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:11,475 INFO L225 Difference]: With dead ends: 324 [2022-11-16 11:16:11,475 INFO L226 Difference]: Without dead ends: 322 [2022-11-16 11:16:11,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 337 SyntacticMatches, 4 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8152 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=871, Invalid=30991, Unknown=0, NotChecked=0, Total=31862 [2022-11-16 11:16:11,477 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 402 mSDsluCounter, 3479 mSDsCounter, 0 mSdLazyCounter, 10679 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 3537 SdHoareTripleChecker+Invalid, 10817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 10679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:11,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 3537 Invalid, 10817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 10679 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-16 11:16:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-16 11:16:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 213. [2022-11-16 11:16:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 212 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2022-11-16 11:16:11,773 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 196 [2022-11-16 11:16:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:11,773 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2022-11-16 11:16:11,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.8076923076923075) internal successors, (396), 104 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2022-11-16 11:16:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-16 11:16:11,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:11,775 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:11,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-16 11:16:11,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-16 11:16:11,975 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:16:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:11,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2018360681, now seen corresponding path program 63 times [2022-11-16 11:16:11,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:11,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657383678] [2022-11-16 11:16:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:11,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 1059 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:13,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657383678] [2022-11-16 11:16:13,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657383678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:16:13,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811722708] [2022-11-16 11:16:13,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:16:13,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:13,403 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:13,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-16 11:16:30,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-11-16 11:16:30,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:30,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 11:16:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 1152 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:31,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 1152 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:32,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811722708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:32,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:16:32,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 79 [2022-11-16 11:16:32,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873879435] [2022-11-16 11:16:32,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:32,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-16 11:16:32,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-16 11:16:32,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=4729, Unknown=0, NotChecked=0, Total=6162 [2022-11-16 11:16:32,790 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 79 states, 79 states have (on average 3.8987341772151898) internal successors, (308), 79 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:34,632 INFO L93 Difference]: Finished difference Result 418 states and 421 transitions. [2022-11-16 11:16:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 11:16:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.8987341772151898) internal successors, (308), 79 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2022-11-16 11:16:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:34,634 INFO L225 Difference]: With dead ends: 418 [2022-11-16 11:16:34,634 INFO L226 Difference]: Without dead ends: 311 [2022-11-16 11:16:34,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 324 SyntacticMatches, 49 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5025 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2434, Invalid=8278, Unknown=0, NotChecked=0, Total=10712 [2022-11-16 11:16:34,635 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 588 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:34,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 392 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:16:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-16 11:16:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 213. [2022-11-16 11:16:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2022-11-16 11:16:34,931 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 200 [2022-11-16 11:16:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:34,932 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2022-11-16 11:16:34,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.8987341772151898) internal successors, (308), 79 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2022-11-16 11:16:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-16 11:16:34,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:34,933 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 25, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:34,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:35,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:35,134 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:16:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:35,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1592182807, now seen corresponding path program 64 times [2022-11-16 11:16:35,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:35,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265038233] [2022-11-16 11:16:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:35,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 0 proven. 2384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:38,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265038233] [2022-11-16 11:16:38,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265038233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:16:38,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488163555] [2022-11-16 11:16:38,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:16:38,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:38,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:38,387 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:38,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-16 11:17:03,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:17:03,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:17:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-16 11:17:03,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:03,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:17:03,466 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:17:03,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:17:03,481 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:17:03,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:17:03,566 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 11:17:03,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:17:05,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:17:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 3 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:05,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:06,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 11:17:06,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 11:17:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 0 proven. 2383 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:17:06,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488163555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:06,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:17:06,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 56] total 84 [2022-11-16 11:17:06,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127852906] [2022-11-16 11:17:06,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:06,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-16 11:17:06,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:17:06,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-16 11:17:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=6688, Unknown=0, NotChecked=0, Total=6972 [2022-11-16 11:17:06,609 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 84 states, 84 states have (on average 3.7142857142857144) internal successors, (312), 84 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:13,971 INFO L93 Difference]: Finished difference Result 319 states and 321 transitions. [2022-11-16 11:17:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-16 11:17:13,971 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.7142857142857144) internal successors, (312), 84 states have internal predecessors, (312), 0 states have call successors, (0), 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 204 [2022-11-16 11:17:13,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:13,973 INFO L225 Difference]: With dead ends: 319 [2022-11-16 11:17:13,973 INFO L226 Difference]: Without dead ends: 317 [2022-11-16 11:17:13,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 371 SyntacticMatches, 10 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4008 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=648, Invalid=18812, Unknown=0, NotChecked=0, Total=19460 [2022-11-16 11:17:13,974 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 227 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 9907 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 3113 SdHoareTripleChecker+Invalid, 10020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 9907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:13,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 3113 Invalid, 10020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 9907 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-16 11:17:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-16 11:17:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 205. [2022-11-16 11:17:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-11-16 11:17:14,267 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 204 [2022-11-16 11:17:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:14,267 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-11-16 11:17:14,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.7142857142857144) internal successors, (312), 84 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-11-16 11:17:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-16 11:17:14,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:14,268 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:14,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:14,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-11-16 11:17:14,469 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:17:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:14,469 INFO L85 PathProgramCache]: Analyzing trace with hash -187046364, now seen corresponding path program 65 times [2022-11-16 11:17:14,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:17:14,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698080595] [2022-11-16 11:17:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:14,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:17:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2377 backedges. 0 proven. 2377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:17,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:17:17,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698080595] [2022-11-16 11:17:17,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698080595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:17:17,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203540174] [2022-11-16 11:17:17,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:17:17,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:17:17,781 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:17:17,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-16 11:17:32,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-11-16 11:17:32,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:17:32,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-16 11:17:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:33,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:17:35,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:17:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2377 backedges. 0 proven. 2377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:35,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:38,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:17:38,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:17:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2377 backedges. 0 proven. 2377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:40,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203540174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:40,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:17:40,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 132 [2022-11-16 11:17:40,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548827383] [2022-11-16 11:17:40,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:40,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-11-16 11:17:40,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:17:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-11-16 11:17:40,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=16820, Unknown=0, NotChecked=0, Total=17292 [2022-11-16 11:17:40,438 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 132 states, 132 states have (on average 3.7954545454545454) internal successors, (501), 132 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:52,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:52,440 INFO L93 Difference]: Finished difference Result 336 states and 339 transitions. [2022-11-16 11:17:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-11-16 11:17:52,441 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.7954545454545454) internal successors, (501), 132 states have internal predecessors, (501), 0 states have call successors, (0), 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 204 [2022-11-16 11:17:52,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:52,443 INFO L225 Difference]: With dead ends: 336 [2022-11-16 11:17:52,443 INFO L226 Difference]: Without dead ends: 334 [2022-11-16 11:17:52,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 327 SyntacticMatches, 4 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8865 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1097, Invalid=44485, Unknown=0, NotChecked=0, Total=45582 [2022-11-16 11:17:52,444 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 426 mSDsluCounter, 4040 mSDsCounter, 0 mSdLazyCounter, 12386 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 4099 SdHoareTripleChecker+Invalid, 12535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 12386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:52,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 4099 Invalid, 12535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 12386 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 11:17:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-16 11:17:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 221. [2022-11-16 11:17:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 224 transitions. [2022-11-16 11:17:52,777 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 224 transitions. Word has length 204 [2022-11-16 11:17:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:52,777 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 224 transitions. [2022-11-16 11:17:52,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.7954545454545454) internal successors, (501), 132 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 224 transitions. [2022-11-16 11:17:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-16 11:17:52,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:52,778 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:52,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:52,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:52,979 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:17:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1806282214, now seen corresponding path program 66 times [2022-11-16 11:17:52,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:17:52,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488288027] [2022-11-16 11:17:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:52,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:17:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1153 proven. 1322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:54,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:17:54,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488288027] [2022-11-16 11:17:54,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488288027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:17:54,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885948519] [2022-11-16 11:17:54,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:17:54,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:54,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:17:54,510 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:17:54,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-16 11:18:21,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-11-16 11:18:21,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:21,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 11:18:21,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1250 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:23,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 1250 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:24,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885948519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:24,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:18:24,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 82 [2022-11-16 11:18:24,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134802952] [2022-11-16 11:18:24,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:24,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-16 11:18:24,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:24,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-16 11:18:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=5100, Unknown=0, NotChecked=0, Total=6642 [2022-11-16 11:18:24,580 INFO L87 Difference]: Start difference. First operand 221 states and 224 transitions. Second operand has 82 states, 82 states have (on average 3.902439024390244) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:26,609 INFO L93 Difference]: Finished difference Result 434 states and 437 transitions. [2022-11-16 11:18:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 11:18:26,609 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.902439024390244) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 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 208 [2022-11-16 11:18:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:26,611 INFO L225 Difference]: With dead ends: 434 [2022-11-16 11:18:26,611 INFO L226 Difference]: Without dead ends: 323 [2022-11-16 11:18:26,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 337 SyntacticMatches, 51 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5422 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2622, Invalid=8934, Unknown=0, NotChecked=0, Total=11556 [2022-11-16 11:18:26,612 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 704 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:26,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 554 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:18:26,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-16 11:18:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 221. [2022-11-16 11:18:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0136363636363637) internal successors, (223), 220 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2022-11-16 11:18:26,960 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 208 [2022-11-16 11:18:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:26,961 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2022-11-16 11:18:26,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.902439024390244) internal successors, (320), 82 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2022-11-16 11:18:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-16 11:18:26,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:26,962 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 26, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:26,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-16 11:18:27,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5acaf54-e176-4151-b05e-05142c6f589a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-16 11:18:27,177 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1187088614, now seen corresponding path program 67 times [2022-11-16 11:18:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:27,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474767815] [2022-11-16 11:18:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:27,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat