./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y --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 be1a0182ecf6c8aa754e6086345670fff3439e7c706169309311fcaa402caa1e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:38:19,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:38:19,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:38:19,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:38:19,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:38:19,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:38:19,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:38:19,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:38:19,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:38:19,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:38:19,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:38:19,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:38:19,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:38:19,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:38:19,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:38:19,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:38:19,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:38:19,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:38:19,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:38:19,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:38:19,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:38:19,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:38:19,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:38:19,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:38:19,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:38:19,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:38:19,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:38:19,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:38:19,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:38:19,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:38:19,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:38:19,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:38:19,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:38:19,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:38:19,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:38:19,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:38:19,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:38:19,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:38:19,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:38:19,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:38:19,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:38:19,881 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:38:19,939 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:38:19,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:38:19,939 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:38:19,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:38:19,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:38:19,940 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:38:19,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:38:19,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:38:19,941 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:38:19,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:38:19,942 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:38:19,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:38:19,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:38:19,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:38:19,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:38:19,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:38:19,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:38:19,943 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:38:19,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:38:19,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:38:19,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:38:19,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:38:19,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:38:19,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:38:19,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:38:19,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:38:19,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:38:19,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:38:19,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:38:19,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:38:19,953 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:38:19,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:38:19,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:38:19,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:38:19,954 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_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be1a0182ecf6c8aa754e6086345670fff3439e7c706169309311fcaa402caa1e [2021-11-13 18:38:20,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:38:20,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:38:20,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:38:20,218 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:38:20,218 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:38:20,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-crafted/zero_sum_const1.c [2021-11-13 18:38:20,302 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/data/6d8111223/441b4b201a334994acad3c50c265f59e/FLAGa536861ca [2021-11-13 18:38:20,744 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:38:20,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/sv-benchmarks/c/array-crafted/zero_sum_const1.c [2021-11-13 18:38:20,758 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/data/6d8111223/441b4b201a334994acad3c50c265f59e/FLAGa536861ca [2021-11-13 18:38:21,138 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/data/6d8111223/441b4b201a334994acad3c50c265f59e [2021-11-13 18:38:21,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:38:21,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:38:21,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:38:21,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:38:21,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:38:21,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1a9304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21, skipping insertion in model container [2021-11-13 18:38:21,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:38:21,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:38:21,314 WARN L228 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_7223022e-d551-4355-bf20-6e51e8f4b8a2/sv-benchmarks/c/array-crafted/zero_sum_const1.c[406,419] [2021-11-13 18:38:21,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:38:21,336 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:38:21,350 WARN L228 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_7223022e-d551-4355-bf20-6e51e8f4b8a2/sv-benchmarks/c/array-crafted/zero_sum_const1.c[406,419] [2021-11-13 18:38:21,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:38:21,367 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:38:21,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21 WrapperNode [2021-11-13 18:38:21,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:38:21,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:38:21,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:38:21,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:38:21,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:38:21,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:38:21,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:38:21,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:38:21,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:38:21,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:38:21,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:38:21,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:38:21,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (1/1) ... [2021-11-13 18:38:21,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:38:21,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:21,454 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:38:21,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:38:21,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:38:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:38:21,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:38:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:38:21,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:38:21,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:38:21,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:38:21,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:38:21,699 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:38:21,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:38:21 BoogieIcfgContainer [2021-11-13 18:38:21,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:38:21,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:38:21,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:38:21,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:38:21,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:38:21" (1/3) ... [2021-11-13 18:38:21,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4769c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:38:21, skipping insertion in model container [2021-11-13 18:38:21,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:38:21" (2/3) ... [2021-11-13 18:38:21,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4769c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:38:21, skipping insertion in model container [2021-11-13 18:38:21,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:38:21" (3/3) ... [2021-11-13 18:38:21,711 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2021-11-13 18:38:21,716 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:38:21,717 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:38:21,786 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:38:21,794 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:38:21,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:38:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:38:21,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:21,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:21,831 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2021-11-13 18:38:21,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:21,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170290672] [2021-11-13 18:38:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:21,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:22,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:22,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170290672] [2021-11-13 18:38:22,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170290672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:22,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:22,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:38:22,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497778758] [2021-11-13 18:38:22,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:22,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:38:22,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:22,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:38:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:38:22,072 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:22,094 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-13 18:38:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:38:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:38:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:22,102 INFO L225 Difference]: With dead ends: 35 [2021-11-13 18:38:22,103 INFO L226 Difference]: Without dead ends: 15 [2021-11-13 18:38:22,106 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:22,110 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:22,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:38:22,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-13 18:38:22,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-13 18:38:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-13 18:38:22,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-13 18:38:22,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:22,142 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-13 18:38:22,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-13 18:38:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:38:22,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:22,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:22,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:38:22,143 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:22,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2021-11-13 18:38:22,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:22,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253842995] [2021-11-13 18:38:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:22,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:22,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:22,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253842995] [2021-11-13 18:38:22,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253842995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:22,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:22,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:38:22,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295184596] [2021-11-13 18:38:22,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:22,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:38:22,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:38:22,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:38:22,221 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:22,279 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-11-13 18:38:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:38:22,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:38:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:22,280 INFO L225 Difference]: With dead ends: 27 [2021-11-13 18:38:22,281 INFO L226 Difference]: Without dead ends: 17 [2021-11-13 18:38:22,281 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:22,283 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.88ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:22,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.88ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 51.26ms Time] [2021-11-13 18:38:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-13 18:38:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-13 18:38:22,288 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) [2021-11-13 18:38:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-13 18:38:22,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-11-13 18:38:22,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:22,289 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-13 18:38:22,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,290 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-13 18:38:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:38:22,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:22,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:22,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:38:22,291 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:22,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:22,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2117745282, now seen corresponding path program 1 times [2021-11-13 18:38:22,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:22,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635223399] [2021-11-13 18:38:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:22,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:38:22,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:22,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635223399] [2021-11-13 18:38:22,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635223399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:22,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:22,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:38:22,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229628239] [2021-11-13 18:38:22,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:22,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:38:22,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:38:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:38:22,374 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:22,416 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-13 18:38:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:38:22,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 18:38:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:22,418 INFO L225 Difference]: With dead ends: 28 [2021-11-13 18:38:22,418 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 18:38:22,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:38:22,420 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:22,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 25 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 32.24ms Time] [2021-11-13 18:38:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 18:38:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-11-13 18:38:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-13 18:38:22,426 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-11-13 18:38:22,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:22,427 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-13 18:38:22,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-13 18:38:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:38:22,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:22,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:22,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:38:22,429 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash -350467326, now seen corresponding path program 1 times [2021-11-13 18:38:22,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:22,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135404939] [2021-11-13 18:38:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:22,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:38:22,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:22,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135404939] [2021-11-13 18:38:22,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135404939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:22,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91789626] [2021-11-13 18:38:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:22,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:22,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:22,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:22,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:38:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:22,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:38:22,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:38:22,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:38:22,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91789626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:22,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:22,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-13 18:38:22,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739268576] [2021-11-13 18:38:22,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:22,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:38:22,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:22,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:38:22,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:38:22,847 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2021-11-13 18:38:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:22,896 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-13 18:38:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:38:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) Word has length 17 [2021-11-13 18:38:22,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:22,898 INFO L225 Difference]: With dead ends: 33 [2021-11-13 18:38:22,898 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 18:38:22,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:38:22,901 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:22,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 44 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 39.32ms Time] [2021-11-13 18:38:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 18:38:22,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-13 18:38:22,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-13 18:38:22,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-11-13 18:38:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:22,908 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-13 18:38:22,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2021-11-13 18:38:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-13 18:38:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 18:38:22,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:22,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:22,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 18:38:23,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:23,138 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:23,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:23,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924836, now seen corresponding path program 2 times [2021-11-13 18:38:23,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:23,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286924197] [2021-11-13 18:38:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:23,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:38:23,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:23,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286924197] [2021-11-13 18:38:23,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286924197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:23,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253619076] [2021-11-13 18:38:23,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:38:23,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:23,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:23,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:23,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:38:23,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:38:23,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:23,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:38:23,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:38:23,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:38:23,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253619076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:23,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:23,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-13 18:38:23,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335083624] [2021-11-13 18:38:23,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:23,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:38:23,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:23,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:38:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:38:23,504 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-11-13 18:38:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:23,566 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-13 18:38:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:38:23,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) Word has length 19 [2021-11-13 18:38:23,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:23,567 INFO L225 Difference]: With dead ends: 35 [2021-11-13 18:38:23,567 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 18:38:23,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:38:23,569 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:23,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [18 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 44.35ms Time] [2021-11-13 18:38:23,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 18:38:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-13 18:38:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-13 18:38:23,575 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2021-11-13 18:38:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:23,575 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-13 18:38:23,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-11-13 18:38:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-13 18:38:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:38:23,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:23,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:23,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:23,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:23,798 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 3 times [2021-11-13 18:38:23,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:23,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047046099] [2021-11-13 18:38:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:23,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:24,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:24,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047046099] [2021-11-13 18:38:24,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047046099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:24,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906728169] [2021-11-13 18:38:24,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:38:24,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:24,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:24,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:24,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:38:24,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:38:24,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:24,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 18:38:24,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:24,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:38:25,774 INFO L354 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-11-13 18:38:25,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 40 [2021-11-13 18:38:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:26,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:28,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2021-11-13 18:38:29,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:29,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 229 [2021-11-13 18:38:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:29,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906728169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:29,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:29,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 49 [2021-11-13 18:38:29,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913519792] [2021-11-13 18:38:29,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:29,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-13 18:38:29,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:29,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-13 18:38:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2069, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:38:29,686 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:30,730 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-11-13 18:38:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 18:38:30,731 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 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 23 [2021-11-13 18:38:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:30,733 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:38:30,733 INFO L226 Difference]: Without dead ends: 55 [2021-11-13 18:38:30,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=498, Invalid=3534, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:38:30,737 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.96ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 117.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:30,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 67 Invalid, 299 Unknown, 0 Unchecked, 2.96ms Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 177 Unchecked, 117.90ms Time] [2021-11-13 18:38:30,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-13 18:38:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-11-13 18:38:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-13 18:38:30,746 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2021-11-13 18:38:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:30,747 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-13 18:38:30,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-13 18:38:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-13 18:38:30,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:30,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:30,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:30,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 18:38:30,966 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:30,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:30,966 INFO L85 PathProgramCache]: Analyzing trace with hash -732186678, now seen corresponding path program 4 times [2021-11-13 18:38:30,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:30,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989950007] [2021-11-13 18:38:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:30,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:38:31,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:31,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989950007] [2021-11-13 18:38:31,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989950007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:31,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124090662] [2021-11-13 18:38:31,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:38:31,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:31,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:31,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:31,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:38:31,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:38:31,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:31,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:38:31,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:38:31,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:38:31,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124090662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:31,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:31,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-13 18:38:31,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070699831] [2021-11-13 18:38:31,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:31,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:38:31,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:31,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:38:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:38:31,299 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:31,448 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-11-13 18:38:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:38:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-13 18:38:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:31,450 INFO L225 Difference]: With dead ends: 81 [2021-11-13 18:38:31,450 INFO L226 Difference]: Without dead ends: 56 [2021-11-13 18:38:31,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:38:31,451 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.14ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:31,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 36 Invalid, 160 Unknown, 0 Unchecked, 2.14ms Time], IncrementalHoareTripleChecker [43 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 109.33ms Time] [2021-11-13 18:38:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-13 18:38:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2021-11-13 18:38:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-11-13 18:38:31,461 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 25 [2021-11-13 18:38:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:31,461 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-11-13 18:38:31,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-11-13 18:38:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:38:31,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:31,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:31,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:31,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:31,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1031419092, now seen corresponding path program 5 times [2021-11-13 18:38:31,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:31,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378111103] [2021-11-13 18:38:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:31,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:38:31,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:31,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378111103] [2021-11-13 18:38:31,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378111103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:31,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015762487] [2021-11-13 18:38:31,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:38:31,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:31,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:31,805 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:31,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:38:31,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-13 18:38:31,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:31,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:38:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:38:31,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:38:32,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015762487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:32,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:32,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-13 18:38:32,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390659564] [2021-11-13 18:38:32,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:32,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:38:32,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:32,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:38:32,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:38:32,078 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:32,238 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-11-13 18:38:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:38:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-13 18:38:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:32,242 INFO L225 Difference]: With dead ends: 52 [2021-11-13 18:38:32,242 INFO L226 Difference]: Without dead ends: 42 [2021-11-13 18:38:32,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:38:32,244 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:32,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 21 Invalid, 158 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [38 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 101.65ms Time] [2021-11-13 18:38:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-13 18:38:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2021-11-13 18:38:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-13 18:38:32,265 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-11-13 18:38:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:32,266 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-13 18:38:32,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-13 18:38:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 18:38:32,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:32,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:32,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:32,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:32,482 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 6 times [2021-11-13 18:38:32,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:32,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998546658] [2021-11-13 18:38:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:32,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:33,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:33,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998546658] [2021-11-13 18:38:33,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998546658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:33,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456955380] [2021-11-13 18:38:33,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:38:33,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:33,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:33,372 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:33,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:38:33,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-13 18:38:33,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:33,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 18:38:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:38:34,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:34,968 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-11-13 18:38:34,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2021-11-13 18:38:35,310 INFO L354 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2021-11-13 18:38:35,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2021-11-13 18:38:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:38:35,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456955380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:35,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:35,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 15] total 45 [2021-11-13 18:38:35,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879804525] [2021-11-13 18:38:35,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:35,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-13 18:38:35,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:35,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-13 18:38:35,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:38:35,413 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 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) [2021-11-13 18:38:36,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:36,652 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-11-13 18:38:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:38:36,653 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 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 29 [2021-11-13 18:38:36,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:36,654 INFO L225 Difference]: With dead ends: 47 [2021-11-13 18:38:36,654 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 18:38:36,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=245, Invalid=3061, Unknown=0, NotChecked=0, Total=3306 [2021-11-13 18:38:36,656 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 384.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.14ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 465.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:36,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 71 Invalid, 668 Unknown, 0 Unchecked, 4.14ms Time], IncrementalHoareTripleChecker [34 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 465.74ms Time] [2021-11-13 18:38:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 18:38:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-11-13 18:38:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-11-13 18:38:36,666 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2021-11-13 18:38:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:36,667 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-11-13 18:38:36,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 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) [2021-11-13 18:38:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-11-13 18:38:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 18:38:36,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:36,668 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:36,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:36,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 18:38:36,882 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:36,882 INFO L85 PathProgramCache]: Analyzing trace with hash 326484464, now seen corresponding path program 7 times [2021-11-13 18:38:36,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:36,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156268805] [2021-11-13 18:38:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:36,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:38:36,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:36,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156268805] [2021-11-13 18:38:36,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156268805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:36,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733414750] [2021-11-13 18:38:36,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:38:36,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:36,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:36,984 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:37,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:38:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:37,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:38:37,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:38:37,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:38:37,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733414750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:37,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:37,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-13 18:38:37,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262364146] [2021-11-13 18:38:37,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:37,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:38:37,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:37,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:38:37,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:38:37,266 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:37,432 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-11-13 18:38:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:38:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-13 18:38:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:37,434 INFO L225 Difference]: With dead ends: 74 [2021-11-13 18:38:37,435 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 18:38:37,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:38:37,437 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:37,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 34 Invalid, 198 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [65 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 118.38ms Time] [2021-11-13 18:38:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 18:38:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-11-13 18:38:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-11-13 18:38:37,448 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2021-11-13 18:38:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:37,448 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-11-13 18:38:37,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:37,449 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-11-13 18:38:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 18:38:37,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:37,453 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:37,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:37,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:38:37,667 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:37,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1551752238, now seen corresponding path program 8 times [2021-11-13 18:38:37,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:37,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232649280] [2021-11-13 18:38:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:37,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:38:37,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:37,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232649280] [2021-11-13 18:38:37,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232649280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:37,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212459013] [2021-11-13 18:38:37,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:38:37,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:37,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:37,780 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:37,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:38:37,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:38:37,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:38:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:38:37,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:38:38,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212459013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:38,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:38,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-13 18:38:38,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485963390] [2021-11-13 18:38:38,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:38,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:38:38,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:38:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:38:38,082 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:38,246 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-11-13 18:38:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:38:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-13 18:38:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:38,247 INFO L225 Difference]: With dead ends: 42 [2021-11-13 18:38:38,247 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 18:38:38,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:38:38,248 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:38,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 28 Invalid, 241 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [44 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 102.54ms Time] [2021-11-13 18:38:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 18:38:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-11-13 18:38:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-13 18:38:38,254 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2021-11-13 18:38:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:38,254 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-13 18:38:38,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-13 18:38:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:38:38,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:38,255 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:38,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:38,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:38,462 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash -827015692, now seen corresponding path program 9 times [2021-11-13 18:38:38,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:38,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123681565] [2021-11-13 18:38:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:38,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:39,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:39,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123681565] [2021-11-13 18:38:39,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123681565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:39,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837152143] [2021-11-13 18:38:39,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:38:39,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:39,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:39,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:39,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:38:39,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-13 18:38:39,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:39,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 18:38:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:41,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:38:41,207 INFO L354 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2021-11-13 18:38:41,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 55 [2021-11-13 18:38:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:38:41,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:44,644 INFO L354 Elim1Store]: treesize reduction 283, result has 33.9 percent of original size [2021-11-13 18:38:44,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 169 treesize of output 191 [2021-11-13 18:38:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:38:46,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837152143] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:46,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:46,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 21] total 65 [2021-11-13 18:38:46,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427363864] [2021-11-13 18:38:46,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:46,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-13 18:38:46,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:46,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-13 18:38:46,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3849, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:38:46,643 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 65 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 65 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:49,608 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-11-13 18:38:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 18:38:49,609 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 65 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-13 18:38:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:49,609 INFO L225 Difference]: With dead ends: 54 [2021-11-13 18:38:49,610 INFO L226 Difference]: Without dead ends: 50 [2021-11-13 18:38:49,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=719, Invalid=8593, Unknown=0, NotChecked=0, Total=9312 [2021-11-13 18:38:49,613 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 241.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.00ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 288.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:49,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 69 Invalid, 745 Unknown, 0 Unchecked, 3.00ms Time], IncrementalHoareTripleChecker [71 Valid, 364 Invalid, 0 Unknown, 310 Unchecked, 288.79ms Time] [2021-11-13 18:38:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-13 18:38:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-11-13 18:38:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 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) [2021-11-13 18:38:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-13 18:38:49,621 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2021-11-13 18:38:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:49,622 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-13 18:38:49,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 65 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-13 18:38:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:38:49,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:49,623 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:49,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:49,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 18:38:49,833 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:49,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:49,834 INFO L85 PathProgramCache]: Analyzing trace with hash -139896938, now seen corresponding path program 10 times [2021-11-13 18:38:49,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:49,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095885244] [2021-11-13 18:38:49,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:49,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:38:49,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:49,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095885244] [2021-11-13 18:38:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095885244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:49,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672148796] [2021-11-13 18:38:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:38:49,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:49,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:49,962 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:49,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:38:50,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:38:50,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:38:50,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:38:50,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:38:50,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672148796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:50,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:50,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-13 18:38:50,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947332364] [2021-11-13 18:38:50,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:50,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:38:50,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:50,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:38:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:38:50,277 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:50,454 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-11-13 18:38:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:38:50,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:38:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:50,455 INFO L225 Difference]: With dead ends: 86 [2021-11-13 18:38:50,455 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 18:38:50,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:38:50,456 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.46ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:50,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 34 Invalid, 224 Unknown, 0 Unchecked, 1.46ms Time], IncrementalHoareTripleChecker [83 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 128.26ms Time] [2021-11-13 18:38:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 18:38:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-11-13 18:38:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-13 18:38:50,464 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2021-11-13 18:38:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:50,464 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-13 18:38:50,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-13 18:38:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 18:38:50,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:50,465 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:50,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:50,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:50,686 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash 38479864, now seen corresponding path program 11 times [2021-11-13 18:38:50,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:50,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066930251] [2021-11-13 18:38:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:50,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:38:50,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:50,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066930251] [2021-11-13 18:38:50,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066930251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:50,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316683900] [2021-11-13 18:38:50,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:38:50,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:50,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:50,799 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:50,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:38:50,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-13 18:38:50,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:50,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:38:50,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:38:51,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:38:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:38:51,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316683900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:38:51,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:38:51,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-13 18:38:51,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733661493] [2021-11-13 18:38:51,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:38:51,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:38:51,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:38:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:38:51,202 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:51,464 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-11-13 18:38:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:38:51,465 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-13 18:38:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:51,466 INFO L225 Difference]: With dead ends: 48 [2021-11-13 18:38:51,466 INFO L226 Difference]: Without dead ends: 44 [2021-11-13 18:38:51,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:38:51,467 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 92 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.24ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:51,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 21 Invalid, 300 Unknown, 0 Unchecked, 2.24ms Time], IncrementalHoareTripleChecker [68 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 157.51ms Time] [2021-11-13 18:38:51,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-13 18:38:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-11-13 18:38:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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) [2021-11-13 18:38:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-11-13 18:38:51,478 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2021-11-13 18:38:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:51,479 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-11-13 18:38:51,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-11-13 18:38:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:38:51,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:51,481 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:51,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:38:51,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:51,689 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:51,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:51,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1622323046, now seen corresponding path program 12 times [2021-11-13 18:38:51,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:51,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060282837] [2021-11-13 18:38:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:51,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:53,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:53,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060282837] [2021-11-13 18:38:53,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060282837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:53,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106216501] [2021-11-13 18:38:53,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:38:53,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:53,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:53,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:53,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:38:53,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-13 18:38:53,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:38:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-13 18:38:53,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:55,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:38:55,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-13 18:38:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:38:55,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:39:00,612 INFO L354 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2021-11-13 18:39:00,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 193 treesize of output 317 [2021-11-13 18:39:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:39:02,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106216501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:39:02,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:39:02,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 25] total 78 [2021-11-13 18:39:02,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315484229] [2021-11-13 18:39:02,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:39:02,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-13 18:39:02,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:02,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-13 18:39:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=5666, Unknown=0, NotChecked=0, Total=6006 [2021-11-13 18:39:02,315 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 78 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 78 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) [2021-11-13 18:39:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:05,549 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-11-13 18:39:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-13 18:39:05,549 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 78 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) Word has length 41 [2021-11-13 18:39:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:05,550 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:39:05,550 INFO L226 Difference]: Without dead ends: 56 [2021-11-13 18:39:05,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=740, Invalid=11692, Unknown=0, NotChecked=0, Total=12432 [2021-11-13 18:39:05,556 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 297.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.55ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 344.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:05,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 110 Invalid, 1032 Unknown, 0 Unchecked, 2.55ms Time], IncrementalHoareTripleChecker [37 Valid, 526 Invalid, 0 Unknown, 469 Unchecked, 344.29ms Time] [2021-11-13 18:39:05,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-13 18:39:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-11-13 18:39:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-11-13 18:39:05,566 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2021-11-13 18:39:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:05,566 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-11-13 18:39:05,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 78 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) [2021-11-13 18:39:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-11-13 18:39:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 18:39:05,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:05,568 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:05,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:05,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:05,777 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:05,778 INFO L85 PathProgramCache]: Analyzing trace with hash 73914556, now seen corresponding path program 13 times [2021-11-13 18:39:05,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:05,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577266706] [2021-11-13 18:39:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:05,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:39:05,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:05,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577266706] [2021-11-13 18:39:05,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577266706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:39:05,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150312013] [2021-11-13 18:39:05,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:39:05,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:05,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:39:05,922 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:39:05,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:39:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:05,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:39:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:39:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:39:06,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:39:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:39:06,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150312013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:39:06,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:39:06,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-13 18:39:06,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328642937] [2021-11-13 18:39:06,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:39:06,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:39:06,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:06,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:39:06,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:39:06,242 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:06,457 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-11-13 18:39:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:39:06,457 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-13 18:39:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:06,458 INFO L225 Difference]: With dead ends: 98 [2021-11-13 18:39:06,458 INFO L226 Difference]: Without dead ends: 55 [2021-11-13 18:39:06,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:39:06,460 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:06,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 35 Invalid, 263 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [92 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 147.03ms Time] [2021-11-13 18:39:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-13 18:39:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-11-13 18:39:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-11-13 18:39:06,471 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2021-11-13 18:39:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:06,471 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-11-13 18:39:06,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-11-13 18:39:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 18:39:06,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:06,473 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:06,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:06,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:39:06,681 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:06,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:06,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1970943902, now seen corresponding path program 14 times [2021-11-13 18:39:06,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:06,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077297390] [2021-11-13 18:39:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:06,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:39:06,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:06,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077297390] [2021-11-13 18:39:06,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077297390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:39:06,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487350912] [2021-11-13 18:39:06,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:39:06,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:06,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:39:06,826 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:39:06,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:39:06,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:39:06,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:39:06,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:39:06,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:39:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:39:07,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:39:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:39:07,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487350912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:39:07,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:39:07,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-13 18:39:07,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103938424] [2021-11-13 18:39:07,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:39:07,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:39:07,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:07,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:39:07,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:39:07,236 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:07,493 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-11-13 18:39:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:39:07,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-13 18:39:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:07,494 INFO L225 Difference]: With dead ends: 54 [2021-11-13 18:39:07,494 INFO L226 Difference]: Without dead ends: 50 [2021-11-13 18:39:07,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:39:07,495 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 87 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:07,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 27 Invalid, 326 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [67 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 143.04ms Time] [2021-11-13 18:39:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-13 18:39:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-11-13 18:39:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-11-13 18:39:07,511 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2021-11-13 18:39:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:07,511 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-11-13 18:39:07,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:07,512 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-11-13 18:39:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 18:39:07,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:07,513 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:07,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:07,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:39:07,733 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:07,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:07,734 INFO L85 PathProgramCache]: Analyzing trace with hash 49745600, now seen corresponding path program 15 times [2021-11-13 18:39:07,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:07,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159615582] [2021-11-13 18:39:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:07,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 4 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:39:09,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:09,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159615582] [2021-11-13 18:39:09,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159615582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:39:09,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462812627] [2021-11-13 18:39:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:39:09,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:09,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:39:09,988 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:39:09,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 18:39:10,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-13 18:39:10,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:39:10,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-13 18:39:10,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:39:10,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:39:13,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:13,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:13,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:13,464 INFO L354 Elim1Store]: treesize reduction 161, result has 33.2 percent of original size [2021-11-13 18:39:13,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 76 treesize of output 109 [2021-11-13 18:39:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 7 proven. 92 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:39:13,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:39:19,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 187 [2021-11-13 18:39:19,132 INFO L354 Elim1Store]: treesize reduction 208, result has 5.9 percent of original size [2021-11-13 18:39:19,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 5942 treesize of output 3906 [2021-11-13 18:39:19,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:39:19,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:39:19,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-11-13 18:39:19,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015279666] [2021-11-13 18:39:19,185 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:39:19,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 18:39:19,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:19,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 18:39:19,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=8906, Unknown=0, NotChecked=0, Total=9702 [2021-11-13 18:39:19,190 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:22,197 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-11-13 18:39:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-13 18:39:22,197 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-13 18:39:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:22,198 INFO L225 Difference]: With dead ends: 68 [2021-11-13 18:39:22,198 INFO L226 Difference]: Without dead ends: 64 [2021-11-13 18:39:22,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3109 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1102, Invalid=12704, Unknown=0, NotChecked=0, Total=13806 [2021-11-13 18:39:22,200 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 511.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.18ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 603.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:22,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 860 Unknown, 0 Unchecked, 3.18ms Time], IncrementalHoareTripleChecker [49 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 603.60ms Time] [2021-11-13 18:39:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-13 18:39:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2021-11-13 18:39:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-11-13 18:39:22,211 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2021-11-13 18:39:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:22,211 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-11-13 18:39:22,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-11-13 18:39:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 18:39:22,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:22,212 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:22,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:22,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:39:22,421 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash 614114658, now seen corresponding path program 16 times [2021-11-13 18:39:22,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:22,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981487418] [2021-11-13 18:39:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:22,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:39:22,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:22,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981487418] [2021-11-13 18:39:22,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981487418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:39:22,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014198417] [2021-11-13 18:39:22,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:39:22,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:39:22,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:39:22,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 18:39:22,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:39:22,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:39:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:39:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:39:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:39:22,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:39:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:39:22,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014198417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:39:22,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:39:22,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-13 18:39:22,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236956682] [2021-11-13 18:39:22,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:39:22,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:39:22,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:39:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:39:22,962 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:23,242 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2021-11-13 18:39:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:39:23,243 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 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 49 [2021-11-13 18:39:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:23,243 INFO L225 Difference]: With dead ends: 110 [2021-11-13 18:39:23,243 INFO L226 Difference]: Without dead ends: 61 [2021-11-13 18:39:23,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:39:23,245 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 189.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:23,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 35 Invalid, 326 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [88 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 189.78ms Time] [2021-11-13 18:39:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-13 18:39:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2021-11-13 18:39:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-11-13 18:39:23,257 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2021-11-13 18:39:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:23,259 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-11-13 18:39:23,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-11-13 18:39:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 18:39:23,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:23,261 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:23,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:23,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:23,473 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2099294916, now seen corresponding path program 17 times [2021-11-13 18:39:23,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:23,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825515123] [2021-11-13 18:39:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:23,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:39:23,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:23,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825515123] [2021-11-13 18:39:23,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825515123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:39:23,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040243885] [2021-11-13 18:39:23,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:39:23,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:23,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:39:23,665 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:39:23,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 18:39:23,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-13 18:39:23,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:39:23,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:39:23,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:39:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:39:24,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:39:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:39:24,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040243885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:39:24,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:39:24,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-13 18:39:24,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762514063] [2021-11-13 18:39:24,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:39:24,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:39:24,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:24,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:39:24,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:39:24,227 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:24,506 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-13 18:39:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 18:39:24,507 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 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 51 [2021-11-13 18:39:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:24,507 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:39:24,507 INFO L226 Difference]: Without dead ends: 56 [2021-11-13 18:39:24,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:39:24,508 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:24,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 25 Invalid, 382 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [74 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 153.77ms Time] [2021-11-13 18:39:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-13 18:39:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-11-13 18:39:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-13 18:39:24,519 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2021-11-13 18:39:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:24,520 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-13 18:39:24,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:24,520 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-13 18:39:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-13 18:39:24,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:24,521 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:24,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:24,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:24,737 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:24,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:24,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1158981530, now seen corresponding path program 18 times [2021-11-13 18:39:24,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:24,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199114283] [2021-11-13 18:39:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:24,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 12 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:39:27,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:27,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199114283] [2021-11-13 18:39:27,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199114283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:39:27,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324555080] [2021-11-13 18:39:27,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:39:27,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:27,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:39:27,827 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:39:27,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 18:39:27,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-13 18:39:27,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:39:27,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-13 18:39:27,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:39:28,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:39:28,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:28,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-13 18:39:32,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:39:32,814 INFO L354 Elim1Store]: treesize reduction 480, result has 29.5 percent of original size [2021-11-13 18:39:32,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 113 treesize of output 229 [2021-11-13 18:39:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:39:33,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:39:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:39:42,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324555080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:39:42,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:39:42,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 33] total 112 [2021-11-13 18:39:42,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636320686] [2021-11-13 18:39:42,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:39:42,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-13 18:39:42,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-13 18:39:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=11571, Unknown=0, NotChecked=0, Total=12432 [2021-11-13 18:39:42,499 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 112 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 112 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:58,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:58,518 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-11-13 18:39:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-13 18:39:58,518 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 112 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-13 18:39:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:58,519 INFO L225 Difference]: With dead ends: 116 [2021-11-13 18:39:58,519 INFO L226 Difference]: Without dead ends: 110 [2021-11-13 18:39:58,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7773 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=2394, Invalid=29468, Unknown=0, NotChecked=0, Total=31862 [2021-11-13 18:39:58,522 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 67 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 904.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1341 IncrementalHoareTripleChecker+Unchecked, 1071.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:58,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 132 Invalid, 2919 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [193 Valid, 1385 Invalid, 0 Unknown, 1341 Unchecked, 1071.43ms Time] [2021-11-13 18:39:58,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-13 18:39:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 59. [2021-11-13 18:39:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 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) [2021-11-13 18:39:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-11-13 18:39:58,536 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2021-11-13 18:39:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:58,536 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-11-13 18:39:58,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 112 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-11-13 18:39:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:39:58,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:58,537 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:58,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:58,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 18:39:58,738 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:58,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1331487352, now seen corresponding path program 19 times [2021-11-13 18:39:58,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:58,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547704276] [2021-11-13 18:39:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:58,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:39:58,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:58,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547704276] [2021-11-13 18:39:58,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547704276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:39:58,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914086784] [2021-11-13 18:39:58,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:39:58,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:58,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:39:58,918 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:39:58,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 18:39:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:58,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:39:58,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:39:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:39:59,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:39:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:39:59,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914086784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:39:59,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:39:59,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-13 18:39:59,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460776216] [2021-11-13 18:39:59,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:39:59,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 18:39:59,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:59,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 18:39:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:39:59,444 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:59,704 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2021-11-13 18:39:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:39:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 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 55 [2021-11-13 18:39:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:59,705 INFO L225 Difference]: With dead ends: 122 [2021-11-13 18:39:59,705 INFO L226 Difference]: Without dead ends: 67 [2021-11-13 18:39:59,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:39:59,706 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 131 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.28ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:59,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 37 Invalid, 384 Unknown, 0 Unchecked, 1.28ms Time], IncrementalHoareTripleChecker [129 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 178.76ms Time] [2021-11-13 18:39:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-13 18:39:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2021-11-13 18:39:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-11-13 18:39:59,719 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2021-11-13 18:39:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:59,719 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-11-13 18:39:59,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-11-13 18:39:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:39:59,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:59,720 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:59,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:59,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:59,933 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:59,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:59,934 INFO L85 PathProgramCache]: Analyzing trace with hash 147323242, now seen corresponding path program 20 times [2021-11-13 18:39:59,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:59,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918558347] [2021-11-13 18:39:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:59,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:40:00,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:00,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918558347] [2021-11-13 18:40:00,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918558347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:00,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745663210] [2021-11-13 18:40:00,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:40:00,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:00,095 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:00,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 18:40:00,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:40:00,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:00,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:40:00,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:40:00,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:40:00,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745663210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:00,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:00,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-13 18:40:00,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211371472] [2021-11-13 18:40:00,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:00,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 18:40:00,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 18:40:00,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:40:00,512 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:00,858 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-11-13 18:40:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 18:40:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 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 57 [2021-11-13 18:40:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:00,859 INFO L225 Difference]: With dead ends: 66 [2021-11-13 18:40:00,859 INFO L226 Difference]: Without dead ends: 62 [2021-11-13 18:40:00,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:40:00,860 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 95 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:00,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 30 Invalid, 477 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [87 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 196.15ms Time] [2021-11-13 18:40:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-13 18:40:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-11-13 18:40:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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) [2021-11-13 18:40:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-11-13 18:40:00,872 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2021-11-13 18:40:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:00,872 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-11-13 18:40:00,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-11-13 18:40:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:40:00,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:00,873 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:00,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:01,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:01,086 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:01,087 INFO L85 PathProgramCache]: Analyzing trace with hash -103051892, now seen corresponding path program 21 times [2021-11-13 18:40:01,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:01,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805217616] [2021-11-13 18:40:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:01,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:05,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:05,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805217616] [2021-11-13 18:40:05,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805217616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:05,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327461866] [2021-11-13 18:40:05,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:40:05,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:05,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:05,039 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:05,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 18:40:05,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 18:40:05,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:05,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-13 18:40:05,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:05,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:40:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:40:11,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:40:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:40:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:40:11,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:40:11,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:40:11,484 INFO L354 Elim1Store]: treesize reduction 303, result has 31.0 percent of original size [2021-11-13 18:40:11,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 98 treesize of output 167 [2021-11-13 18:40:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 11 proven. 156 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:40:12,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:40:24,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327461866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:24,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:24,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 43, 37] total 122 [2021-11-13 18:40:24,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13007872] [2021-11-13 18:40:24,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:24,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-13 18:40:24,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:24,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-13 18:40:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=14014, Unknown=0, NotChecked=0, Total=14762 [2021-11-13 18:40:24,985 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 122 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 122 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:36,642 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2021-11-13 18:40:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-13 18:40:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 122 states have internal predecessors, (145), 0 states have call successors, (0), 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 59 [2021-11-13 18:40:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:36,644 INFO L225 Difference]: With dead ends: 122 [2021-11-13 18:40:36,644 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:40:36,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6022 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=1626, Invalid=29880, Unknown=0, NotChecked=0, Total=31506 [2021-11-13 18:40:36,646 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 232.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 766 IncrementalHoareTripleChecker+Unchecked, 268.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:36,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 149 Invalid, 1215 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [29 Valid, 420 Invalid, 0 Unknown, 766 Unchecked, 268.49ms Time] [2021-11-13 18:40:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:40:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2021-11-13 18:40:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-11-13 18:40:36,660 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2021-11-13 18:40:36,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:36,660 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-11-13 18:40:36,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 122 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-11-13 18:40:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 18:40:36,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:36,661 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:36,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:36,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-13 18:40:36,877 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash -195387090, now seen corresponding path program 22 times [2021-11-13 18:40:36,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:36,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205717683] [2021-11-13 18:40:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:36,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:40:37,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:37,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205717683] [2021-11-13 18:40:37,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205717683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:37,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619915909] [2021-11-13 18:40:37,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:40:37,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:37,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:37,098 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:37,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 18:40:37,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:40:37,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:37,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:40:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:40:37,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:40:37,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619915909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:37,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:37,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-11-13 18:40:37,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972904999] [2021-11-13 18:40:37,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:37,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 18:40:37,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 18:40:37,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:40:37,661 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:37,960 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2021-11-13 18:40:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:40:37,961 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 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 61 [2021-11-13 18:40:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:37,962 INFO L225 Difference]: With dead ends: 134 [2021-11-13 18:40:37,962 INFO L226 Difference]: Without dead ends: 73 [2021-11-13 18:40:37,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:40:37,963 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 164 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:37,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 30 Invalid, 449 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [166 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 195.22ms Time] [2021-11-13 18:40:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-13 18:40:37,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2021-11-13 18:40:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-11-13 18:40:37,982 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2021-11-13 18:40:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:37,982 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-11-13 18:40:37,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-11-13 18:40:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 18:40:37,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:37,983 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:38,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:38,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-13 18:40:38,209 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:38,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:38,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2104585104, now seen corresponding path program 23 times [2021-11-13 18:40:38,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:38,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570640192] [2021-11-13 18:40:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:38,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:40:38,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:38,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570640192] [2021-11-13 18:40:38,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570640192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:38,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349251636] [2021-11-13 18:40:38,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:40:38,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:38,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:38,437 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:38,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 18:40:38,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-13 18:40:38,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:38,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:40:38,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:40:38,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:40:39,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349251636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:40:39,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:40:39,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-11-13 18:40:39,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380173930] [2021-11-13 18:40:39,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:40:39,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 18:40:39,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:40:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 18:40:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:40:39,042 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:40:39,466 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-11-13 18:40:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:40:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-13 18:40:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:40:39,467 INFO L225 Difference]: With dead ends: 72 [2021-11-13 18:40:39,467 INFO L226 Difference]: Without dead ends: 68 [2021-11-13 18:40:39,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=539, Invalid=1911, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:40:39,468 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 202.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 239.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:40:39,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 25 Invalid, 546 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [98 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 239.94ms Time] [2021-11-13 18:40:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-13 18:40:39,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-11-13 18:40:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-11-13 18:40:39,482 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2021-11-13 18:40:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:40:39,482 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-11-13 18:40:39,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:40:39,482 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-11-13 18:40:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:40:39,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:40:39,483 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:40:39,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:40:39,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-13 18:40:39,683 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:40:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:40:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash -370078158, now seen corresponding path program 24 times [2021-11-13 18:40:39,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:40:39,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299915725] [2021-11-13 18:40:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:40:39,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:40:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:40:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:40:44,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:40:44,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299915725] [2021-11-13 18:40:44,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299915725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:40:44,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307276362] [2021-11-13 18:40:44,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:40:44,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:40:44,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:40:44,768 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:40:44,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-13 18:40:44,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-13 18:40:44,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:40:44,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-13 18:40:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:40:45,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:40:52,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:40:52,397 INFO L354 Elim1Store]: treesize reduction 81, result has 34.1 percent of original size [2021-11-13 18:40:52,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 69 [2021-11-13 18:40:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 5 proven. 234 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:40:52,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:41:11,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307276362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:11,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:11,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 51, 41] total 139 [2021-11-13 18:41:11,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961970991] [2021-11-13 18:41:11,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:11,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-11-13 18:41:11,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-11-13 18:41:11,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=778, Invalid=18404, Unknown=0, NotChecked=0, Total=19182 [2021-11-13 18:41:11,595 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 139 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 139 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:26,227 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2021-11-13 18:41:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-13 18:41:26,228 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 139 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-13 18:41:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:26,229 INFO L225 Difference]: With dead ends: 134 [2021-11-13 18:41:26,229 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 18:41:26,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8097 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=1638, Invalid=37764, Unknown=0, NotChecked=0, Total=39402 [2021-11-13 18:41:26,231 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 264.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.02ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 788 IncrementalHoareTripleChecker+Unchecked, 306.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:26,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 165 Invalid, 1262 Unknown, 0 Unchecked, 2.02ms Time], IncrementalHoareTripleChecker [16 Valid, 458 Invalid, 0 Unknown, 788 Unchecked, 306.41ms Time] [2021-11-13 18:41:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 18:41:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 71. [2021-11-13 18:41:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-11-13 18:41:26,253 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 65 [2021-11-13 18:41:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:26,253 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-11-13 18:41:26,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 139 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-11-13 18:41:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:41:26,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:26,254 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:26,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:26,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-13 18:41:26,454 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash 890409044, now seen corresponding path program 25 times [2021-11-13 18:41:26,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:26,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570331474] [2021-11-13 18:41:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:26,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:41:26,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:26,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570331474] [2021-11-13 18:41:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570331474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:26,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322311522] [2021-11-13 18:41:26,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:41:26,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:26,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:26,702 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:26,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-13 18:41:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:26,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:41:26,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:41:27,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:41:27,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322311522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:27,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:27,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-11-13 18:41:27,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444666316] [2021-11-13 18:41:27,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:27,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 18:41:27,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:27,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 18:41:27,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:41:27,366 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2021-11-13 18:41:27,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:27,704 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2021-11-13 18:41:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 18:41:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) Word has length 67 [2021-11-13 18:41:27,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:27,705 INFO L225 Difference]: With dead ends: 146 [2021-11-13 18:41:27,705 INFO L226 Difference]: Without dead ends: 79 [2021-11-13 18:41:27,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:41:27,706 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 176 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:27,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 41 Invalid, 475 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [175 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 217.20ms Time] [2021-11-13 18:41:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-13 18:41:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-11-13 18:41:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-11-13 18:41:27,722 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2021-11-13 18:41:27,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:27,723 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-11-13 18:41:27,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2021-11-13 18:41:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-11-13 18:41:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:41:27,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:27,724 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:27,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:27,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-13 18:41:27,933 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:27,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:27,934 INFO L85 PathProgramCache]: Analyzing trace with hash 999713078, now seen corresponding path program 26 times [2021-11-13 18:41:27,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:27,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010476764] [2021-11-13 18:41:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:27,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:41:28,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:28,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010476764] [2021-11-13 18:41:28,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010476764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:28,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824806826] [2021-11-13 18:41:28,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:41:28,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:28,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:28,197 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:28,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 18:41:28,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:41:28,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:28,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:41:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:41:28,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:41:28,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824806826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:28,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:28,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-11-13 18:41:28,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766639686] [2021-11-13 18:41:28,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:28,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 18:41:28,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:28,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 18:41:28,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:41:28,822 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2021-11-13 18:41:29,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:29,273 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2021-11-13 18:41:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:41:29,274 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) Word has length 69 [2021-11-13 18:41:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:29,274 INFO L225 Difference]: With dead ends: 78 [2021-11-13 18:41:29,274 INFO L226 Difference]: Without dead ends: 74 [2021-11-13 18:41:29,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=647, Invalid=2323, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 18:41:29,275 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 130 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 234.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:29,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 29 Invalid, 604 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [123 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 234.25ms Time] [2021-11-13 18:41:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-13 18:41:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-11-13 18:41:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-13 18:41:29,295 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2021-11-13 18:41:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:29,295 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-13 18:41:29,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2021-11-13 18:41:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-13 18:41:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 18:41:29,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:29,296 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:29,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:29,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 18:41:29,505 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1295173032, now seen corresponding path program 27 times [2021-11-13 18:41:29,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:29,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395729964] [2021-11-13 18:41:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:29,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:36,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:36,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395729964] [2021-11-13 18:41:36,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395729964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:36,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511171248] [2021-11-13 18:41:36,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:41:36,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:36,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:36,023 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:36,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-13 18:41:36,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-13 18:41:36,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:36,165 WARN L261 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-13 18:41:36,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:36,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:41:46,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:46,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:46,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:46,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:46,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:46,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:46,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:46,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:46,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:46,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:46,864 INFO L354 Elim1Store]: treesize reduction 465, result has 30.5 percent of original size [2021-11-13 18:41:46,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 10 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 116 treesize of output 237 [2021-11-13 18:41:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 11 proven. 264 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:41:47,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:42:11,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511171248] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:42:11,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:42:11,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 53, 45] total 151 [2021-11-13 18:42:11,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526822410] [2021-11-13 18:42:11,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:11,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-11-13 18:42:11,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-11-13 18:42:11,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=21618, Unknown=0, NotChecked=0, Total=22650 [2021-11-13 18:42:11,168 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 151 states, 151 states have (on average 1.1655629139072847) internal successors, (176), 151 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) [2021-11-13 18:42:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:32,252 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2021-11-13 18:42:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-13 18:42:32,252 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.1655629139072847) internal successors, (176), 151 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 71 [2021-11-13 18:42:32,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:32,253 INFO L225 Difference]: With dead ends: 146 [2021-11-13 18:42:32,254 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 18:42:32,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9181 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=2208, Invalid=45534, Unknown=0, NotChecked=0, Total=47742 [2021-11-13 18:42:32,258 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 440.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1157 IncrementalHoareTripleChecker+Unchecked, 507.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:32,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 200 Invalid, 1853 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [42 Valid, 654 Invalid, 0 Unknown, 1157 Unchecked, 507.54ms Time] [2021-11-13 18:42:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 18:42:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 77. [2021-11-13 18:42:32,279 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) [2021-11-13 18:42:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-13 18:42:32,279 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 71 [2021-11-13 18:42:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:32,280 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-13 18:42:32,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.1655629139072847) internal successors, (176), 151 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) [2021-11-13 18:42:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-13 18:42:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 18:42:32,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:32,280 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:32,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:32,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:32,493 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:32,494 INFO L85 PathProgramCache]: Analyzing trace with hash 932465402, now seen corresponding path program 28 times [2021-11-13 18:42:32,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:32,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962882742] [2021-11-13 18:42:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:32,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:42:32,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:32,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962882742] [2021-11-13 18:42:32,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962882742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:32,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107327798] [2021-11-13 18:42:32,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:42:32,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:32,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:32,754 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:32,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-13 18:42:32,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:42:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:32,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 18:42:32,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:42:33,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:42:33,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107327798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:42:33,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:42:33,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2021-11-13 18:42:33,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978586753] [2021-11-13 18:42:33,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:33,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 18:42:33,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:33,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 18:42:33,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 18:42:33,419 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:33,824 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2021-11-13 18:42:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:42:33,824 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 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 73 [2021-11-13 18:42:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:33,825 INFO L225 Difference]: With dead ends: 158 [2021-11-13 18:42:33,825 INFO L226 Difference]: Without dead ends: 85 [2021-11-13 18:42:33,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:42:33,827 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 201 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 215.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 258.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:33,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 44 Invalid, 577 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [209 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 258.60ms Time] [2021-11-13 18:42:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-13 18:42:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2021-11-13 18:42:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-11-13 18:42:33,853 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2021-11-13 18:42:33,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:33,853 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-11-13 18:42:33,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-11-13 18:42:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 18:42:33,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:33,854 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:33,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:34,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:34,057 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:34,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1524084132, now seen corresponding path program 29 times [2021-11-13 18:42:34,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:34,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975488047] [2021-11-13 18:42:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:34,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 18:42:34,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:34,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975488047] [2021-11-13 18:42:34,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975488047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:34,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997157577] [2021-11-13 18:42:34,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:42:34,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:34,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:34,357 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:34,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-13 18:42:34,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-13 18:42:34,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 18:42:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 18:42:34,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 18:42:35,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997157577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:42:35,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:42:35,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2021-11-13 18:42:35,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940718709] [2021-11-13 18:42:35,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:35,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 18:42:35,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 18:42:35,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 18:42:35,171 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:35,742 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-11-13 18:42:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-13 18:42:35,742 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 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 75 [2021-11-13 18:42:35,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:35,743 INFO L225 Difference]: With dead ends: 84 [2021-11-13 18:42:35,743 INFO L226 Difference]: Without dead ends: 80 [2021-11-13 18:42:35,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=2775, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 18:42:35,744 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 253.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 308.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:35,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 32 Invalid, 755 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [110 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 308.99ms Time] [2021-11-13 18:42:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-13 18:42:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-11-13 18:42:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-11-13 18:42:35,765 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2021-11-13 18:42:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:35,765 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-11-13 18:42:35,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-11-13 18:42:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 18:42:35,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:35,766 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:35,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-13 18:42:35,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:35,989 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:35,990 INFO L85 PathProgramCache]: Analyzing trace with hash -7769602, now seen corresponding path program 30 times [2021-11-13 18:42:35,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:35,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747434741] [2021-11-13 18:42:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:35,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 13 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:42:41,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:41,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747434741] [2021-11-13 18:42:41,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747434741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:41,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670882458] [2021-11-13 18:42:41,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:42:41,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:41,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:41,885 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:41,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-13 18:42:42,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-13 18:42:42,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:42,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-13 18:42:42,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:42,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:42:42,457 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-13 18:42:42,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-13 18:42:42,659 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-13 18:42:42,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2021-11-13 18:42:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:42:42,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:42:42,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:42:42,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:42:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:42:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:42:42,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:42:42,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2021-11-13 18:43:00,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:00,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:01,532 INFO L354 Elim1Store]: treesize reduction 1992, result has 20.1 percent of original size [2021-11-13 18:43:01,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 28 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 203 treesize of output 549 [2021-11-13 18:43:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 53 proven. 285 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:43:03,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:43:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 18:43:35,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670882458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:43:35,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:43:35,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 61, 49] total 166 [2021-11-13 18:43:35,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321047230] [2021-11-13 18:43:35,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:43:35,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2021-11-13 18:43:35,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:35,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2021-11-13 18:43:35,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=26111, Unknown=0, NotChecked=0, Total=27390 [2021-11-13 18:43:35,445 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 166 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 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) [2021-11-13 18:44:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:12,084 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2021-11-13 18:44:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-13 18:44:12,085 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 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 77 [2021-11-13 18:44:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:12,086 INFO L225 Difference]: With dead ends: 108 [2021-11-13 18:44:12,086 INFO L226 Difference]: Without dead ends: 104 [2021-11-13 18:44:12,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11040 ImplicationChecksByTransitivity, 84.9s TimeCoverageRelationStatistics Valid=2871, Invalid=54487, Unknown=2, NotChecked=0, Total=57360 [2021-11-13 18:44:12,097 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 61 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 565.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1023 IncrementalHoareTripleChecker+Unchecked, 653.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:12,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 206 Invalid, 1870 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [52 Valid, 795 Invalid, 0 Unknown, 1023 Unchecked, 653.49ms Time] [2021-11-13 18:44:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-13 18:44:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2021-11-13 18:44:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-11-13 18:44:12,129 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 77 [2021-11-13 18:44:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:12,129 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-11-13 18:44:12,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 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) [2021-11-13 18:44:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-11-13 18:44:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-13 18:44:12,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:12,131 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:12,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:12,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-13 18:44:12,342 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:12,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:12,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1176580384, now seen corresponding path program 31 times [2021-11-13 18:44:12,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:12,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039474371] [2021-11-13 18:44:12,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:12,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 18:44:12,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:12,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039474371] [2021-11-13 18:44:12,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039474371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:12,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498716355] [2021-11-13 18:44:12,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:44:12,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:12,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:12,665 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:12,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-13 18:44:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:12,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 18:44:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 18:44:13,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-13 18:44:13,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498716355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:13,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:44:13,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2021-11-13 18:44:13,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240157544] [2021-11-13 18:44:13,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:13,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:44:13,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:44:13,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:44:13,387 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:13,833 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2021-11-13 18:44:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 18:44:13,834 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 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 79 [2021-11-13 18:44:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:13,834 INFO L225 Difference]: With dead ends: 170 [2021-11-13 18:44:13,834 INFO L226 Difference]: Without dead ends: 91 [2021-11-13 18:44:13,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 18:44:13,835 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 242 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 282.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:13,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 40 Invalid, 672 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [246 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 282.54ms Time] [2021-11-13 18:44:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-13 18:44:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-11-13 18:44:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-11-13 18:44:13,862 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2021-11-13 18:44:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:13,862 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-11-13 18:44:13,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-11-13 18:44:13,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-13 18:44:13,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:13,863 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:13,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:14,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-13 18:44:14,064 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1550809342, now seen corresponding path program 32 times [2021-11-13 18:44:14,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:14,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273881478] [2021-11-13 18:44:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:14,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 18:44:14,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:14,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273881478] [2021-11-13 18:44:14,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273881478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:14,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536062771] [2021-11-13 18:44:14,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:44:14,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:14,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:14,438 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:14,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-13 18:44:14,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:44:14,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:44:14,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 18:44:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 18:44:15,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 18:44:15,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536062771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:15,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:44:15,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2021-11-13 18:44:15,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841737080] [2021-11-13 18:44:15,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:15,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:44:15,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:15,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:44:15,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:44:15,243 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:15,850 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-11-13 18:44:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-13 18:44:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 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 81 [2021-11-13 18:44:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:15,851 INFO L225 Difference]: With dead ends: 90 [2021-11-13 18:44:15,851 INFO L226 Difference]: Without dead ends: 86 [2021-11-13 18:44:15,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:44:15,852 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 187 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 249.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 300.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:15,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 31 Invalid, 741 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [163 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 300.11ms Time] [2021-11-13 18:44:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-13 18:44:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-11-13 18:44:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-11-13 18:44:15,881 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2021-11-13 18:44:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:15,881 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-11-13 18:44:15,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:15,882 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-11-13 18:44:15,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 18:44:15,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:15,882 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:15,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:16,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-13 18:44:16,083 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash 79107364, now seen corresponding path program 33 times [2021-11-13 18:44:16,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:16,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762075746] [2021-11-13 18:44:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:16,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 16 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:26,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:26,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762075746] [2021-11-13 18:44:26,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762075746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:26,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545758513] [2021-11-13 18:44:26,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:44:26,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:26,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:26,412 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:26,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-13 18:44:26,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-13 18:44:26,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:44:26,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-13 18:44:26,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:27,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:44:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:27,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-13 18:44:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:43,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:44,349 INFO L354 Elim1Store]: treesize reduction 860, result has 25.2 percent of original size [2021-11-13 18:44:44,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 15 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 145 treesize of output 327 [2021-11-13 18:44:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 23 proven. 384 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:44:46,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:34,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 622 treesize of output 574 [2021-11-13 18:45:40,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 3475625 column 7: canceled [2021-11-13 18:45:40,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:45:40,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2021-11-13 18:45:40,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030452715] [2021-11-13 18:45:40,214 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:40,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-13 18:45:40,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:40,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-13 18:45:40,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1761, Invalid=33021, Unknown=0, NotChecked=0, Total=34782 [2021-11-13 18:45:40,218 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:45:42,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10729 ImplicationChecksByTransitivity, 64.2s TimeCoverageRelationStatistics Valid=1761, Invalid=33021, Unknown=0, NotChecked=0, Total=34782 [2021-11-13 18:45:42,223 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:42,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.02ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:45:42,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-13 18:45:42,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:42,436 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 3475627 column 7: canceled at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:256) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.push(ManagedScript.java:124) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:365) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:45:42,441 INFO L158 Benchmark]: Toolchain (without parser) took 441298.96ms. Allocated memory was 109.1MB in the beginning and 434.1MB in the end (delta: 325.1MB). Free memory was 80.8MB in the beginning and 158.4MB in the end (delta: -77.7MB). Peak memory consumption was 247.7MB. Max. memory is 16.1GB. [2021-11-13 18:45:42,441 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory is still 80.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:45:42,441 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.04ms. Allocated memory is still 109.1MB. Free memory was 80.6MB in the beginning and 70.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:45:42,442 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.40ms. Allocated memory is still 109.1MB. Free memory was 70.6MB in the beginning and 69.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:45:42,442 INFO L158 Benchmark]: Boogie Preprocessor took 22.97ms. Allocated memory is still 109.1MB. Free memory was 69.0MB in the beginning and 67.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:45:42,442 INFO L158 Benchmark]: RCFGBuilder took 280.51ms. Allocated memory is still 109.1MB. Free memory was 67.9MB in the beginning and 57.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:45:42,442 INFO L158 Benchmark]: TraceAbstraction took 440737.43ms. Allocated memory was 109.1MB in the beginning and 434.1MB in the end (delta: 325.1MB). Free memory was 57.3MB in the beginning and 158.4MB in the end (delta: -101.2MB). Peak memory consumption was 224.6MB. Max. memory is 16.1GB. [2021-11-13 18:45:42,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory is still 80.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 223.04ms. Allocated memory is still 109.1MB. Free memory was 80.6MB in the beginning and 70.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.40ms. Allocated memory is still 109.1MB. Free memory was 70.6MB in the beginning and 69.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.97ms. Allocated memory is still 109.1MB. Free memory was 69.0MB in the beginning and 67.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 280.51ms. Allocated memory is still 109.1MB. Free memory was 67.9MB in the beginning and 57.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 440737.43ms. Allocated memory was 109.1MB in the beginning and 434.1MB in the end (delta: 325.1MB). Free memory was 57.3MB in the beginning and 158.4MB in the end (delta: -101.2MB). Peak memory consumption was 224.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 3475627 column 7: canceled de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 3475627 column 7: canceled: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:45:42,657 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-13 18:45:42,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y --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 be1a0182ecf6c8aa754e6086345670fff3439e7c706169309311fcaa402caa1e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:45:45,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:45:45,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:45:45,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:45:45,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:45:45,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:45:45,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:45:45,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:45:45,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:45:45,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:45:45,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:45:45,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:45:45,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:45:45,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:45:45,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:45:45,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:45:45,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:45:45,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:45:45,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:45:45,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:45:45,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:45:45,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:45:45,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:45:45,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:45:45,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:45:45,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:45:45,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:45:45,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:45:45,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:45:45,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:45:45,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:45:45,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:45:45,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:45:45,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:45:45,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:45:45,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:45:45,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:45:45,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:45:45,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:45:45,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:45:45,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:45:45,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-13 18:45:45,224 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:45:45,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:45:45,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:45:45,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:45:45,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:45:45,227 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:45:45,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:45:45,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:45:45,229 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:45:45,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:45:45,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:45:45,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:45:45,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:45:45,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:45:45,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:45:45,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:45:45,233 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:45:45,233 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:45:45,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:45:45,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:45:45,234 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:45:45,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:45:45,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:45:45,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:45:45,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:45:45,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:45,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:45:45,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:45:45,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:45:45,237 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:45:45,237 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:45:45,237 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:45:45,238 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:45:45,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:45:45,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:45:45,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:45:45,239 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be1a0182ecf6c8aa754e6086345670fff3439e7c706169309311fcaa402caa1e [2021-11-13 18:45:45,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:45:45,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:45:45,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:45:45,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:45:45,710 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:45:45,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-crafted/zero_sum_const1.c [2021-11-13 18:45:45,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/data/5c336b987/29e78cab1c994eedb9e6f717517aba54/FLAGb323f757b [2021-11-13 18:45:46,478 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:45:46,480 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/sv-benchmarks/c/array-crafted/zero_sum_const1.c [2021-11-13 18:45:46,489 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/data/5c336b987/29e78cab1c994eedb9e6f717517aba54/FLAGb323f757b [2021-11-13 18:45:46,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/data/5c336b987/29e78cab1c994eedb9e6f717517aba54 [2021-11-13 18:45:46,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:45:46,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:45:46,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:45:46,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:45:46,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:45:46,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:45:46" (1/1) ... [2021-11-13 18:45:46,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4668811e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:46, skipping insertion in model container [2021-11-13 18:45:46,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:45:46" (1/1) ... [2021-11-13 18:45:46,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:45:46,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:45:47,039 WARN L228 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_7223022e-d551-4355-bf20-6e51e8f4b8a2/sv-benchmarks/c/array-crafted/zero_sum_const1.c[406,419] [2021-11-13 18:45:47,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:45:47,070 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:45:47,082 WARN L228 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_7223022e-d551-4355-bf20-6e51e8f4b8a2/sv-benchmarks/c/array-crafted/zero_sum_const1.c[406,419] [2021-11-13 18:45:47,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:45:47,134 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:45:47,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47 WrapperNode [2021-11-13 18:45:47,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:45:47,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:45:47,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:45:47,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:45:47,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (1/1) ... [2021-11-13 18:45:47,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (1/1) ... [2021-11-13 18:45:47,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:45:47,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:45:47,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:45:47,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:45:47,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (1/1) ... [2021-11-13 18:45:47,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (1/1) ... [2021-11-13 18:45:47,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (1/1) ... [2021-11-13 18:45:47,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (1/1) ... [2021-11-13 18:45:47,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (1/1) ... [2021-11-13 18:45:47,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (1/1) ... [2021-11-13 18:45:47,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (1/1) ... [2021-11-13 18:45:47,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:45:47,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:45:47,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:45:47,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:45:47,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (1/1) ... [2021-11-13 18:45:47,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:47,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:47,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:45:47,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:45:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:45:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:45:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:45:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:45:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:45:47,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:45:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:45:47,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:45:47,725 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:45:47,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:45:47 BoogieIcfgContainer [2021-11-13 18:45:47,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:45:47,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:45:47,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:45:47,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:45:47,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:45:46" (1/3) ... [2021-11-13 18:45:47,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45819a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:45:47, skipping insertion in model container [2021-11-13 18:45:47,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:47" (2/3) ... [2021-11-13 18:45:47,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45819a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:45:47, skipping insertion in model container [2021-11-13 18:45:47,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:45:47" (3/3) ... [2021-11-13 18:45:47,737 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2021-11-13 18:45:47,743 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:45:47,744 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:45:47,797 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:45:47,805 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:45:47,805 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:45:47,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:45:47,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:47,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:47,847 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:47,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:47,853 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2021-11-13 18:45:47,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:45:47,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741204400] [2021-11-13 18:45:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:47,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:45:47,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:45:47,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:45:47,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:45:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:48,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 18:45:48,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:48,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:48,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:45:48,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741204400] [2021-11-13 18:45:48,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741204400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:48,133 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:48,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 18:45:48,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280649145] [2021-11-13 18:45:48,136 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:48,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:45:48,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:45:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:45:48,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:45:48,177 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:48,196 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-13 18:45:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:45:48,199 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:45:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:48,208 INFO L225 Difference]: With dead ends: 35 [2021-11-13 18:45:48,209 INFO L226 Difference]: Without dead ends: 15 [2021-11-13 18:45:48,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:45:48,217 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:48,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.76ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:45:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-13 18:45:48,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-13 18:45:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-13 18:45:48,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-13 18:45:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:48,257 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-13 18:45:48,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-13 18:45:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:45:48,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:48,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:48,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:48,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:45:48,481 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:48,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2021-11-13 18:45:48,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:45:48,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589855844] [2021-11-13 18:45:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:48,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:45:48,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:45:48,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:45:48,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:45:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:48,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:45:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:48,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:48,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:45:48,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589855844] [2021-11-13 18:45:48,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589855844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:48,804 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:48,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 18:45:48,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341019249] [2021-11-13 18:45:48,806 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:48,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:45:48,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:45:48,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:45:48,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:45:48,814 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:48,867 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-11-13 18:45:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:45:48,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:45:48,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:48,869 INFO L225 Difference]: With dead ends: 22 [2021-11-13 18:45:48,869 INFO L226 Difference]: Without dead ends: 18 [2021-11-13 18:45:48,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:45:48,872 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:48,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 11 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 35.46ms Time] [2021-11-13 18:45:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-13 18:45:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-13 18:45:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-13 18:45:48,880 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-11-13 18:45:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:48,880 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-13 18:45:48,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-13 18:45:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:45:48,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:48,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:48,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:49,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:45:49,094 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1727609346, now seen corresponding path program 1 times [2021-11-13 18:45:49,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:45:49,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188970634] [2021-11-13 18:45:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:49,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:45:49,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:45:49,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:45:49,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:45:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:45:49,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:49,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:49,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:45:49,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188970634] [2021-11-13 18:45:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188970634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:49,382 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:49,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-13 18:45:49,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076625090] [2021-11-13 18:45:49,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:49,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:45:49,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:45:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:45:49,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:45:49,385 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:49,520 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-11-13 18:45:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:45:49,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 18:45:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:49,524 INFO L225 Difference]: With dead ends: 34 [2021-11-13 18:45:49,524 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 18:45:49,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:45:49,526 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:49,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 15 Invalid, 27 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [8 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 95.31ms Time] [2021-11-13 18:45:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 18:45:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-13 18:45:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2021-11-13 18:45:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-13 18:45:49,537 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-11-13 18:45:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:49,538 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-13 18:45:49,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-13 18:45:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:45:49,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:49,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:49,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-13 18:45:49,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:45:49,753 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:49,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1750506814, now seen corresponding path program 1 times [2021-11-13 18:45:49,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:45:49,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706166511] [2021-11-13 18:45:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:49,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:45:49,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:45:49,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:45:49,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:45:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:45:49,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:50,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:50,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:45:50,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706166511] [2021-11-13 18:45:50,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706166511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:50,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:45:50,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-13 18:45:50,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586713743] [2021-11-13 18:45:50,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:50,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:45:50,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:45:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:45:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:45:50,364 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:50,827 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-11-13 18:45:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:45:50,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-13 18:45:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:50,832 INFO L225 Difference]: With dead ends: 50 [2021-11-13 18:45:50,832 INFO L226 Difference]: Without dead ends: 39 [2021-11-13 18:45:50,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:45:50,835 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.81ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 243.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:50,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 42 Invalid, 164 Unknown, 0 Unchecked, 4.81ms Time], IncrementalHoareTripleChecker [42 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 243.47ms Time] [2021-11-13 18:45:50,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-13 18:45:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-11-13 18:45:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-11-13 18:45:50,855 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 17 [2021-11-13 18:45:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:50,855 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-11-13 18:45:50,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-11-13 18:45:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:45:50,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:50,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:50,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:51,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:45:51,061 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:51,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1775953350, now seen corresponding path program 1 times [2021-11-13 18:45:51,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:45:51,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129100119] [2021-11-13 18:45:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:51,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:45:51,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:45:51,064 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:45:51,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:45:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:45:51,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:51,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:51,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:45:51,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129100119] [2021-11-13 18:45:51,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129100119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:51,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:45:51,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-13 18:45:51,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549041438] [2021-11-13 18:45:51,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:51,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:45:51,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:45:51,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:45:51,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:45:51,792 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:52,437 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-11-13 18:45:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:45:52,439 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-13 18:45:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:52,440 INFO L225 Difference]: With dead ends: 76 [2021-11-13 18:45:52,440 INFO L226 Difference]: Without dead ends: 66 [2021-11-13 18:45:52,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:45:52,442 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 153 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 272.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 327.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:52,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 47 Invalid, 266 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [80 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 327.08ms Time] [2021-11-13 18:45:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-13 18:45:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-11-13 18:45:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-11-13 18:45:52,463 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 21 [2021-11-13 18:45:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:52,464 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-11-13 18:45:52,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-11-13 18:45:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:45:52,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:52,467 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:52,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:52,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:45:52,678 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:52,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 2 times [2021-11-13 18:45:52,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:45:52,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796382782] [2021-11-13 18:45:52,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:45:52,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:45:52,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:45:52,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:45:52,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:45:52,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:45:52,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:52,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:45:52,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:52,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:45:53,340 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-13 18:45:53,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2021-11-13 18:45:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:53,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:45:54,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:45:54,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796382782] [2021-11-13 18:45:54,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796382782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:54,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:45:54,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-11-13 18:45:54,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563054708] [2021-11-13 18:45:54,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:54,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:45:54,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:45:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:45:54,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:45:54,277 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:57,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:45:59,483 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:46:01,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:46:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:01,725 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-11-13 18:46:01,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:46:01,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-13 18:46:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:01,727 INFO L225 Difference]: With dead ends: 74 [2021-11-13 18:46:01,728 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 18:46:01,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:46:01,730 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7143.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 7352.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:01,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 317 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [4 Valid, 297 Invalid, 3 Unknown, 13 Unchecked, 7352.59ms Time] [2021-11-13 18:46:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 18:46:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-11-13 18:46:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-11-13 18:46:01,742 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 23 [2021-11-13 18:46:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:01,742 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-11-13 18:46:01,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-11-13 18:46:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:46:01,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:01,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:01,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:01,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:01,956 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:01,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:01,956 INFO L85 PathProgramCache]: Analyzing trace with hash 368620396, now seen corresponding path program 3 times [2021-11-13 18:46:01,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:01,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203746183] [2021-11-13 18:46:01,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:46:01,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:01,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:01,958 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:01,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:46:02,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:46:02,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:46:02,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:46:02,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:46:02,909 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:02,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203746183] [2021-11-13 18:46:02,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203746183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:02,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:02,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-11-13 18:46:02,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424114084] [2021-11-13 18:46:02,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:02,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:46:02,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:46:02,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:46:02,911 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:03,537 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-11-13 18:46:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:46:03,538 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 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 27 [2021-11-13 18:46:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:03,539 INFO L225 Difference]: With dead ends: 74 [2021-11-13 18:46:03,539 INFO L226 Difference]: Without dead ends: 54 [2021-11-13 18:46:03,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:46:03,541 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 280.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.25ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 332.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:03,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 35 Invalid, 300 Unknown, 0 Unchecked, 2.25ms Time], IncrementalHoareTripleChecker [83 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 332.42ms Time] [2021-11-13 18:46:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-13 18:46:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-11-13 18:46:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-13 18:46:03,552 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 27 [2021-11-13 18:46:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:03,552 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-13 18:46:03,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:03,553 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-13 18:46:03,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:46:03,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:03,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:03,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:03,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:03,770 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1031419092, now seen corresponding path program 4 times [2021-11-13 18:46:03,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:03,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138398529] [2021-11-13 18:46:03,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:46:03,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:03,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:03,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:03,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:46:03,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:46:03,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:03,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:46:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:46:04,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:46:04,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:04,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138398529] [2021-11-13 18:46:04,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138398529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:04,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:04,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-13 18:46:04,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581029893] [2021-11-13 18:46:04,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:04,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:46:04,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:46:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:46:04,751 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:05,480 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-11-13 18:46:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:46:05,481 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 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 27 [2021-11-13 18:46:05,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:05,482 INFO L225 Difference]: With dead ends: 57 [2021-11-13 18:46:05,482 INFO L226 Difference]: Without dead ends: 53 [2021-11-13 18:46:05,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:46:05,484 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 164 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 316.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 356.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:05,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 27 Invalid, 262 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [97 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 356.06ms Time] [2021-11-13 18:46:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-13 18:46:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-11-13 18:46:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-11-13 18:46:05,494 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 27 [2021-11-13 18:46:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:05,495 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-11-13 18:46:05,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-11-13 18:46:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 18:46:05,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:05,496 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:05,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:05,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:05,713 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:05,713 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 5 times [2021-11-13 18:46:05,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:05,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953175215] [2021-11-13 18:46:05,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:46:05,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:05,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:05,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:05,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:46:05,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-13 18:46:05,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:05,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:46:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:05,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:46:05,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:05,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 18:46:06,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:06,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:06,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:06,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:46:06,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-13 18:46:07,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:46:07,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2021-11-13 18:46:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:07,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:46:09,138 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:09,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953175215] [2021-11-13 18:46:09,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953175215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:09,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:09,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2021-11-13 18:46:09,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897530849] [2021-11-13 18:46:09,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:09,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:46:09,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:46:09,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:46:09,141 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:10,267 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-11-13 18:46:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:46:10,268 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-13 18:46:10,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:10,268 INFO L225 Difference]: With dead ends: 62 [2021-11-13 18:46:10,269 INFO L226 Difference]: Without dead ends: 42 [2021-11-13 18:46:10,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:46:10,270 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 836.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.78ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 975.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:10,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 64 Invalid, 483 Unknown, 0 Unchecked, 3.78ms Time], IncrementalHoareTripleChecker [23 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 975.01ms Time] [2021-11-13 18:46:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-13 18:46:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2021-11-13 18:46:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-11-13 18:46:10,287 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 29 [2021-11-13 18:46:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:10,287 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-11-13 18:46:10,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-11-13 18:46:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 18:46:10,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:10,289 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:10,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:10,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:10,513 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:10,514 INFO L85 PathProgramCache]: Analyzing trace with hash -438567918, now seen corresponding path program 6 times [2021-11-13 18:46:10,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:10,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527917125] [2021-11-13 18:46:10,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:46:10,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:10,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:10,516 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:10,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:46:10,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-13 18:46:10,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:10,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:46:10,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:46:10,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:46:11,663 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:11,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527917125] [2021-11-13 18:46:11,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527917125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:11,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:11,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-11-13 18:46:11,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528842885] [2021-11-13 18:46:11,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:11,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:46:11,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:11,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:46:11,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:46:11,666 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:12,255 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-11-13 18:46:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:46:12,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-13 18:46:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:12,257 INFO L225 Difference]: With dead ends: 53 [2021-11-13 18:46:12,257 INFO L226 Difference]: Without dead ends: 39 [2021-11-13 18:46:12,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=257, Invalid=865, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:46:12,259 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 79 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 312.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 362.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:12,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 37 Invalid, 363 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [63 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 362.27ms Time] [2021-11-13 18:46:12,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-13 18:46:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-11-13 18:46:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-13 18:46:12,266 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2021-11-13 18:46:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:12,266 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-13 18:46:12,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-13 18:46:12,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:46:12,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:12,268 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:12,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:12,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:12,480 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -827015692, now seen corresponding path program 7 times [2021-11-13 18:46:12,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:12,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101986121] [2021-11-13 18:46:12,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:46:12,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:12,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:12,482 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:12,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:46:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:15,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 18:46:15,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:16,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:46:17,817 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-13 18:46:17,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 19 [2021-11-13 18:46:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:18,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:46:33,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:33,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101986121] [2021-11-13 18:46:33,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101986121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:33,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:33,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 41 [2021-11-13 18:46:33,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876110448] [2021-11-13 18:46:33,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:33,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:46:33,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:33,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:46:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1524, Unknown=4, NotChecked=0, Total=1640 [2021-11-13 18:46:33,095 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:36,981 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:46:43,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:46:48,975 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:46:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:49,738 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-11-13 18:46:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 18:46:49,738 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-13 18:46:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:49,739 INFO L225 Difference]: With dead ends: 53 [2021-11-13 18:46:49,739 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 18:46:49,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=140, Invalid=2018, Unknown=4, NotChecked=0, Total=2162 [2021-11-13 18:46:49,742 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9317.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.05ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 9936.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:49,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 119 Invalid, 1098 Unknown, 0 Unchecked, 7.05ms Time], IncrementalHoareTripleChecker [3 Valid, 1073 Invalid, 3 Unknown, 19 Unchecked, 9936.23ms Time] [2021-11-13 18:46:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 18:46:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-11-13 18:46:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 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) [2021-11-13 18:46:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-13 18:46:49,751 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2021-11-13 18:46:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:49,751 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-13 18:46:49,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-13 18:46:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:46:49,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:49,753 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:49,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:49,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:49,970 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:49,970 INFO L85 PathProgramCache]: Analyzing trace with hash -139896938, now seen corresponding path program 8 times [2021-11-13 18:46:49,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:49,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578172731] [2021-11-13 18:46:49,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:46:49,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:49,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:49,972 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:49,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:46:50,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:46:50,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:50,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:46:50,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:46:50,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:46:51,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:51,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578172731] [2021-11-13 18:46:51,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578172731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:51,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:51,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-11-13 18:46:51,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950419534] [2021-11-13 18:46:51,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:51,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-13 18:46:51,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:51,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-13 18:46:51,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:46:51,401 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:52,837 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2021-11-13 18:46:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 18:46:52,838 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:46:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:52,839 INFO L225 Difference]: With dead ends: 85 [2021-11-13 18:46:52,839 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 18:46:52,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 18:46:52,841 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 167 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 665.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.84ms SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 773.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:52,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 47 Invalid, 638 Unknown, 0 Unchecked, 4.84ms Time], IncrementalHoareTripleChecker [167 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 773.76ms Time] [2021-11-13 18:46:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 18:46:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-11-13 18:46:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-13 18:46:52,852 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2021-11-13 18:46:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:52,852 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-13 18:46:52,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-13 18:46:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 18:46:52,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:52,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:52,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:53,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:53,069 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 38479864, now seen corresponding path program 9 times [2021-11-13 18:46:53,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:53,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065635731] [2021-11-13 18:46:53,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:46:53,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:53,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:53,071 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:53,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:46:53,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-13 18:46:53,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:53,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:46:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:46:53,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:46:54,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:54,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065635731] [2021-11-13 18:46:54,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065635731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:54,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:54,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-11-13 18:46:54,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795398225] [2021-11-13 18:46:54,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:54,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:46:54,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:46:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:46:54,259 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:55,026 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-11-13 18:46:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:46:55,027 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-13 18:46:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:55,028 INFO L225 Difference]: With dead ends: 49 [2021-11-13 18:46:55,028 INFO L226 Difference]: Without dead ends: 45 [2021-11-13 18:46:55,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=329, Invalid=1231, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:46:55,031 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 85 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 372.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.25ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 437.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:55,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 34 Invalid, 450 Unknown, 0 Unchecked, 3.25ms Time], IncrementalHoareTripleChecker [71 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 437.62ms Time] [2021-11-13 18:46:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-13 18:46:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-11-13 18:46:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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) [2021-11-13 18:46:55,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-11-13 18:46:55,042 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2021-11-13 18:46:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:55,042 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-11-13 18:46:55,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:55,043 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-11-13 18:46:55,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:46:55,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:55,044 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:55,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:55,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:55,257 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:55,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:55,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1622323046, now seen corresponding path program 10 times [2021-11-13 18:46:55,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:55,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305434031] [2021-11-13 18:46:55,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:46:55,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:55,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:55,259 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:55,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:49:12,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:49:12,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 18:49:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:12,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:49:16,111 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-11-13 18:49:16,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 22 [2021-11-13 18:49:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:16,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:49:45,943 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:45,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305434031] [2021-11-13 18:49:45,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305434031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:45,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:49:45,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 50 [2021-11-13 18:49:45,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646363848] [2021-11-13 18:49:45,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:45,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-13 18:49:45,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:45,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-13 18:49:45,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2309, Unknown=6, NotChecked=0, Total=2450 [2021-11-13 18:49:45,946 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 50 states, 50 states have (on average 1.42) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:51,147 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:00,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:07,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:10,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:11,292 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-11-13 18:50:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-13 18:50:11,293 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.42) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-13 18:50:11,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:11,294 INFO L225 Difference]: With dead ends: 84 [2021-11-13 18:50:11,294 INFO L226 Difference]: Without dead ends: 80 [2021-11-13 18:50:11,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=182, Invalid=3352, Unknown=6, NotChecked=0, Total=3540 [2021-11-13 18:50:11,296 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15290.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.09ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 16342.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:11,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 110 Invalid, 1335 Unknown, 0 Unchecked, 7.09ms Time], IncrementalHoareTripleChecker [6 Valid, 1318 Invalid, 3 Unknown, 8 Unchecked, 16342.06ms Time] [2021-11-13 18:50:11,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-13 18:50:11,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 47. [2021-11-13 18:50:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-11-13 18:50:11,311 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2021-11-13 18:50:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:11,311 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-11-13 18:50:11,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.42) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-11-13 18:50:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 18:50:11,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:11,313 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:11,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:11,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:11,517 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash 73914556, now seen corresponding path program 11 times [2021-11-13 18:50:11,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:11,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324293408] [2021-11-13 18:50:11,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:50:11,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:11,521 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:11,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:50:11,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-13 18:50:11,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:50:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:50:12,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:50:13,988 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:13,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324293408] [2021-11-13 18:50:13,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324293408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:13,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:50:13,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-11-13 18:50:13,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323279969] [2021-11-13 18:50:13,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:13,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:50:13,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:13,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:50:13,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:50:13,990 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 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) [2021-11-13 18:50:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:16,566 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2021-11-13 18:50:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:50:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 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 43 [2021-11-13 18:50:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:16,568 INFO L225 Difference]: With dead ends: 107 [2021-11-13 18:50:16,568 INFO L226 Difference]: Without dead ends: 55 [2021-11-13 18:50:16,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=706, Invalid=3076, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 18:50:16,571 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 266 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 959.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.77ms SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1116.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:16,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 54 Invalid, 1037 Unknown, 0 Unchecked, 4.77ms Time], IncrementalHoareTripleChecker [268 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1116.24ms Time] [2021-11-13 18:50:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-13 18:50:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-11-13 18:50:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:16,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-11-13 18:50:16,580 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2021-11-13 18:50:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:16,581 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-11-13 18:50:16,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 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) [2021-11-13 18:50:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-11-13 18:50:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 18:50:16,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:16,582 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:16,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:16,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:16,783 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:16,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:16,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1970943902, now seen corresponding path program 12 times [2021-11-13 18:50:16,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:16,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365552615] [2021-11-13 18:50:16,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:50:16,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:16,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:16,786 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:16,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:50:16,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-13 18:50:16,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:16,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:50:16,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:50:17,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:50:19,216 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:19,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365552615] [2021-11-13 18:50:19,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365552615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:19,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:50:19,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-11-13 18:50:19,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966064349] [2021-11-13 18:50:19,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:19,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 18:50:19,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:19,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 18:50:19,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:50:19,219 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 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) [2021-11-13 18:50:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:21,813 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-11-13 18:50:21,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 18:50:21,814 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 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 45 [2021-11-13 18:50:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:21,815 INFO L225 Difference]: With dead ends: 101 [2021-11-13 18:50:21,815 INFO L226 Difference]: Without dead ends: 83 [2021-11-13 18:50:21,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=659, Invalid=2763, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 18:50:21,817 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 396 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1343.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.22ms SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1463.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:21,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 60 Invalid, 859 Unknown, 0 Unchecked, 4.22ms Time], IncrementalHoareTripleChecker [289 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 1463.57ms Time] [2021-11-13 18:50:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-13 18:50:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2021-11-13 18:50:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-11-13 18:50:21,835 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 45 [2021-11-13 18:50:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:21,835 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-11-13 18:50:21,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 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) [2021-11-13 18:50:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-11-13 18:50:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 18:50:21,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:21,837 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:21,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:22,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:22,046 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash 49745600, now seen corresponding path program 13 times [2021-11-13 18:50:22,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:22,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948236678] [2021-11-13 18:50:22,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:50:22,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:22,055 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:22,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7223022e-d551-4355-bf20-6e51e8f4b8a2/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process